April 25th and 26th. There's an old saying "keep your friends close and your enemies closer". Overlooking the Dordogne, Château de Beynac sits strategically high on steep cliffs, while on the other side of the river—several kilometers away but still in sight—Château de Castelnaud perches safely above the village below. During the Hundred Years War the river was a border between England and France. Beynac claimed French allegiance, Castelnaud English allegiance. (Some photo captions have more information.)