At the end of the 19th Century, Tanzania’s Changuu Island, also known as Prison Island, was the quarantine station for Zanzibar, Kenya, Uganda and Tanganyika after an outbreak of the Black Death. Now, the island welcomes tourists with its beautiful beaches and giant tortoises. The island hosts a population of Aldabra giant tortoises, one of the largest tortoises in the world. (Photos: Mahmut Serdar Alakus/Anadolu Agency/Getty Images/VCG)