For the scientifically minded, there's a great deal to learn painlessly in the Cite des Sciences et de l'Industrie at La Villette (see page 72).
At Cite des Sciences et de l'Industrie you can learn scientific notions.
Across the river are Beynac's rival, Cetelnaud, its ruins recently restored and now housing a museum of medieval warfare, and the privately owned 15th-century castle of Fayrac, complete with restored drawbridge, battlements, and pepperpot towers.