The prehistoric site of Les Fieux is located in the northern part of the Causse de Gramat, north of Quercy, in the municipality of Miers (Lot, France). It falls within the territory of the Causses and Vallée de la Dordogne Community of Communes and is located on land acquired by this inter-municipal structure.

Traces of human occupation ranging from the beginning of the Middle Paleolithic (340,000 years) to the Middle Ages have been found in several distinct sites, including a decorated cave extending through a karstic gut that has collapsed in its central part ("locus 1") and an open-air site (“locus 2”).

The site has been the subject of a major development project with a view to its protection and presentation to the public. It can be visited since June 2007.