Prison Island or Changuu Island is the middle island of the three visible from the Stone Town. It takes approximately 30 minutes to get there by boat. The prison which was never used on this island was built in 1893, but was later used as a Quarantine Hospital.
Apart from the Prison ruins you will also see the enormous giant tortoises which are the main attraction of the island. The tortoises were brought on the island from Seychelles by Sultan Said Majid in the 1820’s. On this little paradise one can also swim, snorkel, sunbathe or just relax on the beach and enjoy the peacefulness that this small beautiful island has to offer.