Bassin Blanc and its viewpoint

One question immediately arises: why "White," when the water is clearly green? The most common explanation lies precisely in this contrast. The name would not come from the color of the water, but from the milky mist which frequently envelops these heights and sometimes veils the lake's surface with a diffuse white—a phenomenon consistent with the altitude and humidity of the area. Another, less documented, theory links the name to nearby Mont Blanc, a mountain in the Chamouny highlands. Neither of these explanations is based on a formal historical source: the first is the most widespread and plausible, the second remains a hypothesis.

Bassin Blanc occupies an ancient volcanic crater, like Grand Bassin and Trou aux Cerfs. Mauritius is entirely of volcanic origin, and these circular basins are the most legible scars of this past: after the end of the eruptions, the collapse of the structure left a depression, which rain and springs gradually filled.

Regarding the details of its formation, it's best to remain cautious: sources diverge, and none are based on precise geological data accessible to the general public. Some describe Bassin Blanc as a classic collapse crater; others suggest an ancient lake of solidified lava; still others link the volcano's activity to the formation of the colored earths of the nearby Vallée des Couleurs (Valley of Colors). These versions are not necessarily contradictory, but none can be presented as definitive. What is certain is the volcanic origin of the site and its characteristic circular shape.

What is striking on site, however, is undeniable: the proximity. Where many craters are viewed from afar or from above, here you stand directly on the rim, almost at the level of the treetops growing in the basin, and the water seems within reach.

Bassin Blanc has left few traces in the archives—it is a site that has remained isolated, largely undocumented by official history. A few details circulate, however, which should be taken for what they are: reported traditions rather than established facts.

The lake is sometimes also referred to as "Trou Kanaka" in some sources that list the island's craters. However, this usage is confusing, as another crater with the same name is located elsewhere on the island: use with caution. It is also stated that the crater would have was once considered a sacred place by the inhabitants of the area; the claim is repeated in tourist presentations, without being supported by a historical source.

The most well-documented link is both geological and historical: the eruption of the Bassin Blanc volcano is regularly presented as being the origin of the colored lands of the Valley of Colors the neighboring site, whose famous hues are thought to result from the weathering of rocks produced by this volcanic activity, is thus two faces of the same volcanic past, separated by only a few minutes at the entrance to Chamouny.

The color is what everyone notices first: a bright, opaque green, very different from the blue we associate with lakes. This hue comes from the microscopic life in the water—algae and microorganisms—favored by stagnant, warm water rich in organic matter that falls from the forest bordering the crater.

It's a closed lake: little or no current, a basin sheltered from the wind, a basin fed primarily by rain and runoff from the wooded banks. These conditions also explain why the water is murky and opaque. The color can vary depending on the season, the light, and recent rainfall—from a soft green under the midday sun to darker tones on overcast days.

The crater is surrounded by dense vegetation that extends down to the water's edge. This is one of the reasons why the place seems so isolated: the wooded walls cut it off from the rest of the landscape and give the impression of a closed, silent world, shut off from its body of water.

This forest is a habitat for birds, and that's one of the pleasant surprises of the site. You can spot, in particular, the white-tailed tropicbirdThis large white bird with its long, tapering tail, usually associated with coastal cliffs, is unexpectedly seen soaring above a forest lake inland. Sightings are by no means guaranteed: they depend on timing and luck, and often require a bit of patience and a careful gaze towards the treetops.

One point of vocabulary on the maps can be confusing, and it's best to know it before you come. Two distinct locations have similar names: the “Bassin Blanc view”, a viewpoint accessible within a few steps from the road, and the crater itself, slightly below in the forest. Some online listings even label the place sometimes as a "crater", sometimes as a "hiking trail".

In practical terms: the view of the lake is easily accessible, without any effort, once the car is parked—this is what most visitors see, and it's the main attraction. For those who wish to extend their visit, a path allows you to venture deeper into the forest surrounding the basin. It is not marked like a developed hiking trail: don't expect any signs, and do not descend towards the water (see the safety section).

What you don't see, it must be said: there are no facilities, no information panels, no picnic tables, no shops. Bassin Blanc is not an organized attraction but a raw, natural site. This is exactly what those who appreciate it come for, and what disappoints those who were expecting a developed park.

This is the most important point on this page. The crater's rim drops sharply into the water. without any railings or protective barriersWe find ourselves directly on the edge, often on soft or slippery ground after the rain, with the void and water just below.

The area has been the scene of accidents. The local press has documented drownings and regularly reminds people of the dangers of the location. Therefore, a few simple rules are essential:

• Do not get too close to the edge, especially to take a picture — This is the classic circumstance of the fall.
• Keep a constant eye on the children and keep them away from the edge: no barrier will stop them.
• Do not attempt to go down to the water's edge. nor to swim in it: the walls are steep and unstable, the climb back up is difficult, and the depth of the lake is unknown.
• Avoid the site in rainy weather or just afterwards, when the ground becomes slippery.
• Wearing closed shoes with good adhesion.

These precautions should not discourage visitors—the site can be viewed safely as long as a reasonable distance is maintained from the edge. They simply serve as a reminder that you are in an unsecured natural area, and you are responsible for your own safety.

A visit to Bassin Blanc is short: its appeal is greatly enhanced when combined with a broader exploration of the south, one of the most beautiful regions of the island. See our page on the south of Mauritius.

In the immediate Vicinity:

• The Valley of Colors (Valley Adventure Park), right at the entrance to Chamouny, with its multicoloured land, waterfalls and activities — the most direct neighbour of Bassin Blanc.
• The area boasts numerous waterfalls in the surrounding wooded gorges. See our selection of waterfalls of the island.

A little further on, going up or down:

• Grand Bassin (Ganga Talao), the other southern crater lake, a major hindu spiritual site, is on the same road towards the plateau.
• There tea route and the bois Chéri estate, towards the east.
• On the south coast, the rochester waterfall, Souillac and the gris-Gris beach.
• THE endemic garden of the Osterlog valley, to extend the discovery of the nature of the south.

For a pre-planned route, see our circuit in the south-central region.

Bassin Blanc is located on Route B102, in the hills above Chamouny, north of Chemin-Grenier, in the Savanne district. The crater is just a short walk from the road, making it very easy to access once you arrive — the difficulty is mainly not missing it.

Access by car

By car, the easiest option is by far the best. The B102, which climbs from Chemin-Grenier towards Grand Bassin, winds through a beautiful forest and offers panoramic views of Chamonix and the Rivière-des-Galets coast at several bends. It's a winding mountain road: drive carefully, especially as fog can roll in at higher elevations.

The site is poorly signposted and the entrance is discreet: locate the area in advance and rely on the map on this page rather than a simple place name, as online listings sometimes duplicate information between the viewpoint and the crater. Once parked on the roadside, the lake is just a short walk away. To plan your journeys, see our guide to the car rental in Mauritius.

By taxi or with a driver

Due to the lack of convenient public transport to the site, the taxi hiring a driver for the day is the only alternative to a rental car. This is a sensible option if you're visiting several places in the south in the same day: the driver usually knows the location, which solves the problem of road signs.

The climate of the highlands

Like the rest of the Southern interior, chamonix is cooler, wetter, and receives more rainfall than the Coast. the forest is often waterlogged, and fog is frequent. See our page on the weather in Mauritius and bring something to cover yourself with, even in good weather on the coast.

Access and price

The site is free and open accessThere is no ticket office, no official opening hours, and no warden. As a precaution, visit during the day and preferably in the middle of the day, when the light illuminates the bottom of the crater and makes the water the greenest.

How much time should I allow?

Contemplating the lake from the edge takes about twenty to thirty minutes, including taking photos. Allow more time if you extend your visit with a walk in the forest, and integrate the visit into a day trip to the south rather than making it a separate destination.

What to pack

• Closed-toe shoes with good grip are recommended, as the surface of the ledge may be soft or slippery.
• A warm or waterproof garment: The higher altitudes are cool and damp.
• Water and mosquito repellent, as the forest is home to them.
• Patience and a keen eye are needed if you hope to see the birds.

Accessibility

The view of the crater is reached after a short walk from the road, across uneven, undeveloped natural terrain. The site is not suitable for wheelchairs or strollers, and the lack of barriers makes it unsuitable for very young children without close supervision. See our guide to holidays in Mauritius for people with disabilities.

Is it safe to swim in Bassin Blanc?

No, it's neither planned nor prudent. The crater walls are steep and unstable, climbing back up would be difficult, and the lake's depth is unknown. There have been drownings at the site: it's best to simply admire it from the rim.

Is there a fee for access?

No. Bassin Blanc is open and free to access, without tickets or opening hours.

Is it Dangerous?

The area is safe as long as you keep a reasonable distance from the edge, which is unprotected and drops sharply into the water. Accidents happen when people get too close to the edge, often while taking a photo. Keep a close eye on children.

What is the difference between Bassin Blanc and Grand Bassin?

These are two distinct crater lakes in the south of the island, often confused because of their names. Great Basin (Ganga Talao) is a major hindu pilgrimage site, well-developed and very popular. white Basin Is a raw, wild, and rarely visited natural site. they Are on the same road and can be easily combined into a single day trip.

Why is the water Green?

The color comes from the algae and microorganisms that thrive in this stagnant, warm water rich in organic matter that falls from the forest. It varies according to the season and the light.

Why is this lake called "White Basin" if its water is green?

The name likely comes not from the color of the water but from the milky mist that often blankets these heights and sometimes veils the lake's surface. This is the most common explanation; another, less well-established, evokes the nearby Mont Blanc. Neither is supported by a formal historical source.

Can we see birds there?

Yes, the forest bordering the crater is a habitat for birds, and you might spot the white-tailed tropicbird there, a bird more commonly associated with coastal cliffs. Sightings are never guaranteed and require a bit of patience.

How much time should be Allowed?

The lake view takes about twenty to thirty minutes to reach, longer if you extend your walk into the forest. It's a stop worth including in a day trip to the south.

Is it accessible to people with reduced Mobility?

No. Access is via uneven, undeveloped natural terrain, not suitable for wheelchairs or strollers.