Prison Island (also known as Changuu Island) is a small island 5.6 km northwest of Stone Town. The island is about 800m long and 230m wide, the island was use as a prison for rebellious slaves in 1860s and also functioned as a coral mine. The British First Minister of Zanzibar, Lloyd Mathews, purchased the island in 1893 and constructed a prison complex there. No prisoners were ever housed on the island and instead it became a quarantine station for leprosy cases. The station was only occupied for around half of the year and the rest of the time it was a popular holiday destination. 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 the Seychelles. At the end you will have the complimentary refreshment at cafe Foro.