Clinging to the cliff, offering a view that extends as far as the Italian Riviera, the Jardin Exotique provides a rare change of scenery, with 900 varieties of beautiful semi-arid plants. Species include hundred-year-old cacti, euphorbias, giant aloes and prickly pears. In this charming setting, the Observatory Cave, which has been hollowed out of the limestone rock, is home to forests of stalagmites and stalactites as well as many other delicate concretions.