Asinara National Park
At the top north of Sardinia, the island of Asinara is THE place to be alone. Nobody lives in this gorgeous island aside from the rangers patrolling the highly protected national park. There's a hostel where visitors can spend the night in the summer months, but even at its maximum occupancy, there's never more than a couple of hundred people on the island, and no cars. Several hiking trails start right outside of the hostel, one leading to the gorgeous Cala Sabina, pictured here.