Sterkfontein Caves visitor guide — everything you need to know before visiting

At a glance

Address

Kromdraai Road, Sterkfontein, near Krugersdorp, Gauteng, South Africa

Hours

Tuesday–Sunday, 09:00–16:00, last tour at 16:00. Closed Mondays; public holidays can affect opening

Entry style

Timed guided cave tour only, hourly departures, capped at 30 people per group

UNESCO status

Inscribed 1999, part of the Fossil Hominid Sites of South Africa (Cradle of Humankind)

Landmark finds

Mrs Ples (Sts 5, found 1947) and Little Foot (StW 573, c. 3.67 million years old)

Managed by

University of the Witwatersrand (Wits), which took over all visitor and research operations on 1 April 2024

Closed 2022–2025

Closed after flood damage in December 2022; reopened 15 April 2025 with reinforced walkways and LED lighting

Distance from Johannesburg

About 40 km northwest (roughly 50 km by road), around an hour's drive

Cave temperature

A constant, cool 20°C (68°F) year-round

What is Sterkfontein Caves?

Sterkfontein Caves is a dolomite cave system in Gauteng, South Africa, and the richest single source of early-hominin fossils on Earth. Since systematic excavation began here in the 1930s, the site has yielded more than 700 hominin specimens — more early-hominin material than any other single site — among them two of the most famous fossils in the study of human evolution, "Mrs Ples" and "Little Foot," both found within the same cave system visitors walk through today.

The caves sit at the centre of the Cradle of Humankind, an area of Gauteng and North West provinces containing dozens of fossil-bearing dolomite caves. Sterkfontein is by far the most extensively excavated of them, and since 1 April 2024 all of its visitor and research operations have been run by the University of the Witwatersrand (Wits), the institution whose researchers — beginning with Robert Broom in the 1930s and 1940s — made most of the site's landmark discoveries.

What is the Cradle of Humankind, and why is Sterkfontein its centrepiece?

The Cradle of Humankind was inscribed as a UNESCO World Heritage Site in 1999, under the listing "Fossil Hominid Sites of South Africa," recognising the exceptional density and scientific value of the hominin fossils recovered from its cluster of dolomite caves — among them Sterkfontein, Swartkrans, Kromdraai and Drimolen. The name refers to the sheer concentration of early human ancestors found here, spanning several million years of the human evolutionary story.

Sterkfontein is the most extensively excavated and productive site within the Cradle, and the one most geared toward visitors, with a developed cave tour, museum and laboratory. Fossils recovered here have directly reshaped scientific understanding of when early hominins began walking upright, how their brains and hands changed over time, and how the genus Australopithecus relates to the later emergence of Homo. That combination of scientific weight and physical accessibility is why Sterkfontein, rather than any of the Cradle's other caves, is usually described as its centrepiece.

What is an australopithecine, and why were so many found here?

Australopithecus is an extinct genus of early hominins that lived in Africa between roughly 4 and 2 million years ago. Australopithecines walked upright on two legs, like modern humans, but retained many ape-like features — smaller brains, longer arms relative to their legs, and skulls with heavier brow ridges and jaws. They sit on the human family tree between earlier, more ape-like ancestors and the genus Homo, to which modern humans belong, making them a pivotal transitional group in the story of human evolution.

Sterkfontein's fossils belong mainly to Australopithecus africanus, alongside later evidence of early Homo and Paranthropus. Little Foot was assigned by its excavators to a separate species, Australopithecus prometheus, though that attribution is disputed — a 2025 reassessment argues the specimen sits within A. africanus. Fossils accumulate at Sterkfontein because the cave system acted as a natural trap: animals and hominins fell or were carried into vertical shafts and sinkholes over millions of years, and their remains were gradually buried and cemented into the rock as calcified sediment, known as breccia, which protected the bones and preserved them for palaeontologists to later excavate.

Mrs Ples: the 1947 discovery that made Sterkfontein famous

On 18 April 1947, Scottish-born palaeontologist Robert Broom and his assistant John T. Robinson uncovered a remarkably complete adult skull at Sterkfontein, which Broom initially classified as a new species, Plesianthropus transvaalensis ("near-man from the Transvaal"). Broom's young co-workers nicknamed the fossil "Mrs Ples," and the name stuck even after the species was later reclassified as Australopithecus africanus — the same species as the fossils Broom had begun finding at Sterkfontein a decade earlier.

Mrs Ples (specimen Sts 5) was long dated to roughly 2.1–2.5 million years old on the basis of flowstone and related dating methods. Cosmogenic nuclide re-dating of the deposit it came from, published in PNAS in 2022, pushed Sterkfontein's Australopithecus material back to around 3.4–3.7 million years, and Wits now cites about 3.3 million years for Mrs Ples — while other material still quotes the older figures, so you will see different numbers depending on the source. Either way it remains one of the most complete Australopithecus africanus skulls ever found. Its sex is also debated: Broom judged the skull female from the size of its canine sockets, but most researchers now consider Sts 5 to be male. Whichever the case, the discovery confirmed Sterkfontein as a major fossil site and helped vindicate Raymond Dart's then-controversial theory that Africa, not Europe or Asia, was the birthplace of humanity.

Mrs Ples wasn't Broom's first Sterkfontein find, but it was the one that made headlines. He had already recovered the crushed cranium TM 1511 in 1936 — the first adult Australopithecus fossil ever found — after lime miners blasted it out of the cave infill, and continued excavating the same quarry deposit for years afterward. The 1947 skull was simply more complete and more photogenic, and it arrived at a moment when the scientific world was finally ready to take Broom's — and Dart's — claims about African human origins seriously.

Little Foot: the most complete early-hominin skeleton ever found

In September 1994, palaeontologist Ronald J. Clarke was sorting through boxes of unidentified animal bones from earlier excavations when he recognised four small hominin foot bones — the discovery that gave "Little Foot" its name. Clarke traced matching fragments to a specific breccia block still inside the cave's Silberberg Grotto, and in 1997 began the painstaking in-situ excavation of the skeleton, assisted by Stephen Motsumi and Nkwane Molefe, who spent years carefully chiselling the fossil free from the surrounding rock without damaging it.

The result, designated StW 573, is the most complete Australopithecus skeleton ever found anywhere in the world — giving researchers an unprecedented, single-individual record of the skull, spine, arms, legs and feet of an early hominin. Clarke assigned it to a separate species, Australopithecus prometheus, though that attribution remains contested: a 2025 reassessment argues the traits it shares with the type specimen are not distinctive enough, and places it closer to A. africanus. Little Foot is most commonly dated to around 3.67 million years old using cosmogenic nuclide dating of the surrounding rock, a figure broadly supported by more recent studies, though the exact age of Sterkfontein's deeper deposits remains an active area of scientific debate. Freeing, cleaning and reconstructing the skeleton took roughly two decades, and it was unveiled at Wits in December 2017; a full cast of the skeleton is now on display at the site.

How do scientists know how old these fossils are?

Dating fossils this old rarely relies on a single method. At Sterkfontein, researchers combine palaeomagnetic dating (which reads reversals in Earth's magnetic field recorded in the rock), uranium-lead dating of flowstone layers, electron-spin-resonance analysis, and — for the deepest deposits containing Little Foot — cosmogenic nuclide dating, which measures rare isotopes that accumulate in rock only once it is exposed near the surface, letting scientists work out how long ago a cave chamber and its contents were buried.

These methods don't always agree precisely, which is why you'll sometimes see slightly different ages quoted for the same fossils in different sources. Little Foot's cosmogenic date of roughly 3.67 million years, for instance, has been debated against other biochronological estimates for the same deposit; more recent studies have tended to converge closer to that older figure. This is normal, healthy science rather than a problem with the site — Sterkfontein's deposits are geologically complex, and refining their dates is part of why research here continues.

None of this affects what you'll see on the tour — the excavation sites, the chambers and the fossils themselves are unchanged by which dating figure a given paper favours. It's simply worth knowing, if you read up on Sterkfontein before or after your visit, that you may come across slightly different numbers for the same fossil depending on the source and its publication date.

How did the Sterkfontein cave system form?

The rock beneath Sterkfontein is dolomite, laid down as sediment on the floor of a shallow sea roughly 2.5 billion years ago, when colonies of ancient cyanobacteria helped precipitate the calcium-rich minerals that would eventually harden into dolomite. Over hundreds of millions of years this dolomite was buried under later layers of quartzite and shale, then gradually exposed again as the region's geology shifted and the ancient sea retreated.

The caves themselves formed through karstification — slightly acidic groundwater slowly dissolving channels and chambers out of the dolomite along natural joints and fault lines, a process that shaped the present cave system over roughly the last 20 to 30 million years. The result is a network of caverns — more than 2.5 km of them mapped — including the Elephant Chamber and the vast Milner Hall, where the water table that once filled the caves has retreated to leave an underground lake and dramatic rock formations, including pinnacles left hanging where dolomite has dissolved away around them.

That long geological process is also why the cave is such a good fossil trap. Sinkholes and vertical shafts opened onto the surface at various points as the caves developed, and over millions of years animals — and occasionally hominins — fell in or were washed or dragged in by predators. Their bones settled onto the cave floor, were gradually cemented by dripping, mineral-rich water into hard breccia, and were sealed away until modern excavation cut back through that same rock to reach them.

What does the guided cave tour actually show you?

The guided tour descends into the cave system via a stairway, passing chambers with cave formations — stalactites, stalagmites and flowstone — before reaching the larger spaces such as the Elephant Chamber, the lowest point on the route, and Milner Hall, which holds the cave system's underground lake. Along the way the tour passes excavation sites that are still active today — a genuinely different experience from viewing fossils behind glass, since you're standing in the ground where they were recovered.

A trained guide leads each group, explaining the excavation history and the science behind the dating of the fossils as you go. The route involves stairs and some low, narrow sections that require crouching in places, and helmets are provided and required throughout. Tours depart roughly every hour between 09:00 and 16:00, are capped at 30 people, and last between about one hour and one hour thirty minutes depending on group pace and questions.

Because each group is a fixed size and moves together, the pace is set by the guide rather than self-directed — you won't be rushed past the excavation sites, but you also won't be able to linger indefinitely at any one chamber if the rest of the group is ready to move on. Guides generally welcome questions throughout, and the excavation chambers specifically tend to be where visitors ask the most, since standing at the spot where a 3.67-million-year-old skeleton was recovered is a very different experience from reading about it afterward.

Why was Sterkfontein closed, and what changed when it reopened?

In December 2022, intense rainfall saturated the ground above the cave system and flushed soil and debris into the caves, destabilising sections of the tour route and prompting the site's first-ever full public closure in early 2023. Wits University, working with structural engineers, carried out a comprehensive safety assessment and a lengthy rehabilitation programme, including structural reinforcement of unstable sections and the installation of seismic monitoring equipment to track ongoing rock movement.

Sterkfontein reopened to the public on 15 April 2025, more than two years after the closure, with rebuilt walkways, LED lighting through the cave route, new signage, an upgraded museum and a new fossil preparation laboratory and improved water-management measures aimed at reducing the risk of future flood damage from the nearby Bloubankspruit stream. Wits University took over all visitor and research operations at Sterkfontein on 1 April 2024, ending the previous arrangement under which Maropeng ran the site's tourism, which has also brought closer integration between the cave tours, the museum and the university's ongoing research programme.

Read the full guide: Best Time to Visit Sterkfontein Caves →

The museum, Timeline Walk and fossil preparation laboratory

Above ground, the site has a Timeline Walk through the landscape alongside the museum, which presents the story of the first discoveries at the caves and some of the iconic fossils of the Cradle of Humankind. A temporary exhibition space opened with the 2025 reopening displays finds from Sterkfontein and Swartkrans, including one of only two full casts of the Little Foot skeleton and the first complete leg of a Paranthropus.

The working fossil preparation laboratory is often the section that surprises first-time visitors most: researchers can sometimes be seen cleaning and cataloguing genuine fossil material recovered from ongoing excavations, a reminder that Sterkfontein isn't a finished historical exhibit but an active scientific dig. Unlike the cave system, the museum, Timeline Walk and laboratory are all fully wheelchair-accessible. The tour normally runs cave first, then the laboratory, then the museum. This is the part of the visit that remains open to you if the cave tour isn't suitable for you.

Most visitors do the cave tour first and the museum and Timeline Walk afterward, since the underground route is on a fixed departure time and the above-ground exhibits are self-paced. Doing it this way also means the museum's displays land with more context — having just stood in the excavation chambers yourself makes the replica skulls and information panels feel considerably less abstract.

Getting to Sterkfontein Caves from Johannesburg

Sterkfontein is about 40 km northwest of central Johannesburg, (roughly 50 km by road), typically around an hour's drive via the N14, then the R563 and Kromdraai Road into the Cradle of Humankind. The site publishes driving and self-arrival directions only, so most international visitors arrive by rental car, private transfer or organised day tour from Johannesburg or Pretoria.

The route is signposted once you are within the Cradle of Humankind area — the final turn is marked for Kromdraai / Sterkfontein Caves, with the entrance about a kilometre further on. Allow extra time if you're leaving Johannesburg during the morning rush hour, since traffic on the way out of the city can add significantly to the drive. Because the guided tour departs on a fixed hourly schedule, it's worth building in a buffer rather than cutting the drive time close — arriving after your tour has left means waiting for the next available slot, if one has capacity.

Self-driving gives the most flexibility for combining Sterkfontein with other Cradle of Humankind stops on the same day, while a private transfer or organised tour suits visitors who'd rather not navigate unfamiliar roads. Whichever way you travel, treat the drive as part of the day rather than a formality — the R563 passes through open Highveld grassland that's worth taking in on the way.

Should you combine Sterkfontein with Maropeng?

Maropeng, the visitor centre for the wider Cradle of Humankind, sits a short drive from Sterkfontein and offers a broader, more general introduction to human evolution through interactive exhibits. The two are separate operations: Maropeng ran tourism and ticketing at Sterkfontein until 1 April 2024, but since then the University of the Witwatersrand has run the caves entirely, so a Maropeng ticket does not cover the cave tour and each site has to be booked on its own. Many visitors still pair them into a single day trip from Johannesburg — Maropeng for context and overview, Sterkfontein for the specific, tangible experience of the actual cave and excavation sites where Mrs Ples and Little Foot were found.

If your schedule only allows one site, Sterkfontein gives the more direct connection to the fossils themselves, since you're walking through the real cave system rather than a purpose-built exhibition centre — and since its April 2025 reopening it also has an upgraded museum, a new exhibition and a working fossil preparation laboratory above ground. If you do plan to see both in one day, build in enough time for each visit and the drive between them, and buy each site's ticket separately.

There's no fixed order that works best — some visitors prefer Maropeng first for the broader context, others prefer Sterkfontein first while they're fresh for the cave tour's stairs, then a more relaxed afternoon at Maropeng's exhibits. Either way, book the Sterkfontein cave tour for a specific hour rather than treating it as flexible, since it's the one part of the day tied to a fixed departure time: tours run hourly from 09:00 to 16:00, Tuesday to Sunday, and each is capped at 30 people.

When is the best time to visit?

Because tours run hourly with a strict 30-person capacity, timing is as much about availability as comfort. The first tour or two after the 09:00 opening tend to be quietest, while late morning through early afternoon is typically busiest, especially on weekends and during South African school holidays, when slots can fill days in advance.

Weekdays, particularly Tuesday to Thursday, are consistently calmer than weekends. The cave's interior holds a constant 20°C year-round regardless of season, so the underground part of the visit doesn't change much through the year — the main seasonal factor is South African school holiday demand above ground, and Gauteng's afternoon thunderstorms during the November–March rainy season, which mainly affect the drive rather than the tour itself.

Read the full guide: Best Time to Visit Sterkfontein Caves →

How physically demanding is the cave tour?

The cave route involves a substantial stairway — visitors commonly report well over a hundred steps down and back up over the course of the tour — along with uneven, sometimes wet or slippery surfaces underfoot. Several sections require crouching through low, narrow passages, and the tour is not step-free at any point. Comfortable, closed-toe, non-slip footwear is essential, and loose or flowing clothing is best avoided given the tight spaces.

For these reasons, the guided cave tour is not recommended for visitors with significant mobility restrictions, and the site states that the caves are not wheelchair friendly. It also advises against the tour for visitors with claustrophobia or acute asthma. Visitors who are uncomfortable in dark, confined or enclosed spaces should also think carefully before booking, since parts of the route are genuinely tight and dimly lit even with the cave's lighting. The museum, Timeline Walk and fossil preparation laboratory are fully wheelchair-accessible and don't involve any of these constraints.

None of this is meant to overstate the difficulty — most reasonably fit visitors of any age manage the tour comfortably, and guides pace the group and point out where to place your feet on the trickier sections. It's simply a genuine underground cave rather than a paved, purpose-built walkway, and it's worth arriving with the right expectations and footwear rather than being caught out partway down.

Is Sterkfontein Caves good for children?

The operator's child ticket band starts at age 6, and children from around that age tend to find the cave tour genuinely exciting — a real cave, a helmet to wear, and a guide who tells the story of Mrs Ples and Little Foot in terms that land well with kids. The fossil preparation laboratory, where real fossils are sometimes still being cleaned, is often a particular highlight for younger visitors.

The tour's darkness, stairs and enclosed spaces make it a better fit for confident older children than toddlers or children who are nervous underground. Under-6s are admitted free with a paying adult, and no minimum age is published for the cave tour itself, but families with very young children may prefer splitting the visit — one adult on the cave tour while another explores the fully accessible museum and Timeline Walk.

What tends to land best with kids isn't the science vocabulary so much as the human story behind it — that real people, some of them not much older than teenagers when they started, spent years carefully freeing a single skeleton from solid rock, or that a scientist looking through old boxes of bones recognised a foot nobody else had noticed. Guides generally tailor their explanations when they see a family group, and it's worth mentioning ahead of time if you have children along so they can pitch the tour accordingly.

Read the full guide: Visiting Sterkfontein Caves with Kids →

What's on site, and what should you bring?

Sterkfontein has an on-site café for light meals and drinks, alongside the museum, Timeline Walk and fossil preparation laboratory. Helmets for the cave tour are provided and required; bags and handbags are best left in your vehicle, since guides ask visitors to keep hands free in the narrower passages, and it's worth bringing water for the walk.

Comfortable, closed-toe, non-slip shoes matter more here than at most attractions, given the cave's stairs and occasionally wet, uneven floor — light clothing works well since you'll move between the cool cave and the warmer surface buildings. Personal, non-commercial photography is welcome throughout the museum, laboratory and cave tour, though visitors are asked not to touch stalactites, stalagmites or other formations, and not to remove anything from the site.

A reusable water bottle is more useful than food for the tour itself, since there's nowhere to eat underground — save the café for before or after.

Common misconceptions about Sterkfontein Caves

The most common mix-up is confusing Sterkfontein with Maropeng, the separate visitor centre for the wider Cradle of Humankind a short drive away — Maropeng is a purpose-built exhibition, while Sterkfontein is the actual cave and excavation site, and since 1 April 2024 the two have been run by different organisations, with separate tickets. Visitors also often ask about seeing the original Mrs Ples and Little Foot: those two specimens are curated elsewhere — Little Foot at the Hominin Vault at Wits in Johannesburg, Mrs Ples (Sts 5) at the Ditsong National Museum of Natural History in Pretoria — but the exhibition space opened in 2025 does display iconic finds from Sterkfontein and Swartkrans, including one of only two full casts of the Little Foot skeleton and the first complete leg of a Paranthropus.

Another misconception is that the fossil preparation laboratory means visitors will watch new hominin fossils being excavated live — in reality, the lab shows the meticulous cleaning and cataloguing stage that follows excavation, which is itself a slow, careful process rather than a dramatic dig. And while Sterkfontein is correctly described as a UNESCO World Heritage Site, that status belongs to the wider Cradle of Humankind listing rather than to Sterkfontein alone — a distinction worth knowing if you're visiting more than one of the Cradle's caves.

Is Sterkfontein still an active dig?

Excavation and research at Sterkfontein has continued in some form since Robert Broom's era in the 1930s and 1940s. Researchers still study previously excavated material and work through new finds in the on-site fossil preparation laboratory that visitors see as part of their ticket, and refinements to the dating of existing fossils — including Little Foot — continue to be published as techniques improve.

Much of this research is supported by the Palaeontological Scientific Trust (PAST), a South African organisation that has long supported research at Sterkfontein and across the wider Cradle of Humankind. That continuity is part of what distinguishes Sterkfontein from a closed historical site: the cave you tour and the laboratory you walk through are still, in a real sense, part of an active area of human-origins research.

For visitors, that mostly shows up as small details: a display panel that's been updated since your last visit, a guide mentioning a recent paper, or simply seeing researchers actually at work in the preparation laboratory rather than an empty exhibit behind glass. It's part of what makes Sterkfontein feel different from a conventional heritage site — the story it tells is still, quite literally, being written.

Frequently asked questions