Trou Al'Wesse is a prehistoric cave. It is known for its archaeological and geological significance, as it contains finds from various prehistoric periods, including the Mesolithic and Neolithic periods. The cave was first discovered in the 19th century and has been explored several times since then. Archaeologists have found tools, bones, and other remains here that indicate its use by prehistoric humans. Sediments from the Trou Al'Wesse cave revealed Neanderthal genes, although only animal bones and tools had previously been found there.
Beautiful natural paths and forest trails lead to the cave amidst pristine nature. The cave is not accessible. The entrance, sealed with steel plates and wire mesh, has been defaced by graffiti.