Above the village rooftops, cut directly into the overhanging limestone cliff, the Fort Troglodyte is the most dramatic thing to see in La Roque-Gageac and the one that most people walk straight past without realising it exists. A steep path climbs from the village street up through the rock to reach the hollowed-out chambers and defensive walls that form the fort, with extraordinary views over the Dordogne River and the surrounding valley.
The fortification dates to the 12th century and was built by the Bishops of Sarlat, who recognised the natural defensive potential of the rock. The troglodyte construction means much of the structure is simply the cliff itself — walls are minimal because the overhang acts as a natural ceiling and protection. In the late medieval period villagers would retreat here when English raiding parties came through the valley. The fort is small but gives an immediate sense of how people lived in this landscape: the cliff as both shelter and fortress, the river below as both highway and moat.