Cala Sabina, Asinara: Asinara is a virtually uninhabited island off the northwest tip of Sardinia measuring 52 square kilometers. It's hilly, rocky and barren, and designated a nature reserve, inhabited by wild albino donkeys. In the past it has been a leper colony and a high-security prison, but is now open to tourists attracted by its unique setting and coves of azure water such as Cala Sabina.