Cotencher, Palaeolithic residential cave

Grotte de Cotencher in Rochefort is a Palaeolithic cave dwelling set in the Areuse gorge in the Swiss canton of Neuchâtel. It ranks among the oldest archaeological sites in Switzerland and was home to Neanderthals over many millennia.

What is the Cotencher cave?

The cave opens in the rock wall of the Gorges de l'Areuse at about 660 m above sea level. The Historical Dictionary of Switzerland (HLS) gives its length as roughly 18 m, with around 200 m² of living space. The canton's archaeology service describes the chamber as 25 × 11 × 5 m. Sediment layers reach 4–5 m in places, and reading them reveals successive periods of occupation.

How old is it, and who lived here?

Neanderthals used the cave, and the tools found inside belong to the Mousterian culture of the Middle Palaeolithic. Neuchâtel archaeologists date the oldest traces of habitation to about 180,000 years ago, making Cotencher the oldest known archaeological site in the canton. The HLS places the Mousterian occupation around 40,000 BC. The gap reflects repeated use of the cave across many phases.

Excavations produced several hundred flint artefacts, many animal bones and human remains, found in 1964.

How was Cotencher investigated?

• 1867: Henri-Louis Otz and Charles Knab carried out the first digs.
• 1916–1918: the main campaign, led by Hans Georg Stehlin and Auguste Dubois, yielded dozens of animal species and hundreds of stone tools.
• 2015–2019: the "Cotencher Project", run by the cantonal archaeologists with the Maison de la Nature neuchâteloise, combined fieldwork with lab analysis and prepared the cave for visitors.

Selected finds are displayed at the Laténium museum in Hauterive.

How can you visit?

The cave reopened to the public in 2018. You can enter only on guided tours, offered from June to September. Check current dates and booking rules with the canton of Neuchâtel or the Maison de la Nature neuchâteloise before you travel. Bring warm clothing and sturdy shoes: the cave is cool and paths in the gorge can be slippery.

What else is nearby?

The Areuse gorge is a popular hiking region, and the Laténium in Hauterive covers the canton's archaeology from the Palaeolithic to the Iron Age. Near Couvet you will also find the Les Plaints cave, another Neanderthal site, under study since 2021.

Frequently asked questions

Can I enter the Cotencher cave on my own? No. Visits are guided and run from June to September.

How old are the earliest human traces? The Neuchâtel archaeologists give about 180,000 years. Older references place the Mousterian occupation around 40,000 BC.

Where can I see objects from Cotencher? The Laténium museum in Hauterive shows selected finds.

Which canton is the cave in? Neuchâtel, in the municipality of Rochefort, within the Gorges de l'Areuse.