The cave-complex was carved out by the Volp River resulting in three extensive caverns: Enlène Cave [fr], Trois-Frères and Tuc d'Audoubert.

[5] Occupied in the Upper Palaeolithic, notably during the Magdalenian Epoch, the caves have been extensively studied.

These works on Tuc d'Audoubert were compiled in 2009 in a monograph entitled "The Secret Sanctuary of the Bison".

A subsequent book entitled "The Cave of the Three Brothers" ("La Caverne des Trois-Frères")[6] documents a century of research.

Montesquieu was a country house founded in 1272 on the initiative of the Comte de Comminges Bernard VI.