Le Grand Lac de Clairvaux

The Grand Lake of Clairvaux contains more than 18 prehistoric pile-dwelling sites submerged in water at an altitude of 525 meters in Jura.

Archaeological excavations began in 1835, leading to the discovery of oak poles emerging from lake chalk in 1870, marking France's first wet Neolithic site.

The remains reveal the existence of the La Motte-aux-Magnins cultural group, which influenced regions across the Saône plains and western Jura.

The site requires specific water level maintenance to protect submerged archaeological remains and prevent excessive vegetation growth in the lake.

Research identified forty different tree species used by ancient inhabitants, indicating diverse woodland formations including riverine, oak, and beech forests.

Location: Clairvaux-les-Lacs

Part of: prehistoric pile dwellings around the Alps

GPS coordinates: 46.57170,5.74917

Latest update: June 23, 2025 09:47