 Mountains frame both ends of the region—the Cevennes to the northeast and the Pyrenees to the south.The area is known for its scenery, with jagged ridges, deep river canyons and rocky limestone plateaus, with large caves underneath.Rennes-le-Château was the site of a prehistoric encampment, and later a Roman colony, or at least Roman villa or temple, such as is confirmed to have been built at Fa, west of Couiza, part of the Roman province of Gallia Narbonensis, the wealthiest part of Roman Gaul.