Bruniquel Cave - Credit: Wikimedia Commons
Bruniquel Cave is an archeological site near Bruniquel, in an area which has many paleolithic sites, east of Montauban in southwestern France. Annular (ring) and accumulation (pile) structures made of broken stalagmites have been found 336 metres from the cave entrance. Traces of fire were also found. The constructions have been dated to approximately 176,000 years ago. Read more on Wikipedia
Source: en.wikipedia.org