At Prison Island, you will able to See Aldabra Giant Tortoise, Peacocks, Dik-dik (species of small Antelope), Prison ruins, etc. An interesting fact about the Aldabra Giant tortoise is that they can live for more than 200 years. The Oldest one at Prison Island is 197 years old. They are one of the world's longest-living animals. Prison Ruins: This is a building that was erected in 1983 to host the Central Prison of Zanzibar. The Jail construction Started in 1893, In the same year, They had been a Cholera Epidemic in Egypt, and shortly afterward Bubonic Plague in Bombay. Since Zanzibar was the Main East African Port, Authorities decided That the Prison and other Erected Buildings were to keep in readiness as a Quarantine Station to proper control measures for vessels and their passengers to avoid the risk of an Epidemic in the Zanzibar Archipelago.