Prison Island also known as Changuu Island or Quarantine Island. This is a small island 5.6Km North West of stone town. The island is around 800m long and 230m wide at its broadest point. The island used as prison for rebellious slaves in 1860s and also function as coral mine. The island named as quarantine because of the yellow fever cases. More recently, the island has become a government owned tourist resort and houses a collection of endangered Aldabra giant tortoises which were originally a gift from the British governor of Seychelles. Also the guests can do snorkeling and swimming around Prison Island.