A lovely walk that takes you to the heights of Casterino to discover the military fortifications.
Departure point: hamlet of Casterino.
Follow the road northeast for about 2 km, then turn west following the signs for Baisse de Peyrafique.
Take the track, which climbs steadily for about 3 km to the top of the Baisse.
Then descend towards Casterino, following the signs from marker 369.