Prison Island gets its name from the prison built to condemn Zanzibar citizens to the isolation of the island, looking out at the coast. The prison was never used, and the Island is now home to a tortoise sanctuary, prison ruins, and hotel. It is 20 minutes by boat ride from Stone Town and has spectacular coral reefs to enjoy snorkeling. Giant Aldabra tortoises shuffle through the trees, with the patience that old age brings you. Some of these tortoises are said to be over 100 years old. Lunch is available on the island at your own cost. If you’re feeling active, you can snorkel in the crystal clear waters in search of colorful tropical fish darting through the reef or soak up some sun on the white sandy beach. The Prison Island Excursion is a great companion to a morning Stone Town Tour. After an eventful morning of walking through the busy streets of Zanzibar, you can enjoy this slow and relaxing island excursion.