If you do just one daytrip from Villasimius, make it the 15-minute drive south to Capo Carbonara, a protected marine park. The promontory dips spectacularly into the crystal-clear water of the Med. Besides perfect conditions for scuba divers, the area has some gorgeously secluded bays with white quartz sand, backed by cliffs cloaked in macchia and wildflowers. Walking trails teeter off in all directions. The drive takes you past the Notteri salt lake, where flamingos and shearwaters flock in winter.