The town of Bonifacio – counting 2,700 inhabitants – is crouching on the chalk cliffs at Corsica's southernmost point. Beyond the sea one can make out Sardinia. Because the rock is increasingly undermined by the surf, the buildings along the very edge are at risk of dropping into the sea. Narrow streets lead through the maze of house in the medieval upper town. The church opposite the citadel was built by crusaders during the 13th century. A path along the cliffs leads to Capo Pertusato. From there, one can admire the most beautiful view of the city.