The trip to Prison Island, a 700m long strip 5km northwest of Stone Town, makes a great excursion. Prison Island gets its name from the prison built to condemn Zanzibar citizens to the isolation of the island, looking out at the coast. Previously owned by an Arab to house his rebellious slaves, the prison was never used, and the island is now home to a tortoise sanctuary, prison ruins and a hotel.

Prison Island is 20 minutes away from Stone Town by boat and has spectacular coral reefs to enjoy while snorkeling. A coral rag forest within the Island is home to duiker antelopes, bats, butterflies and weavers but the long-lasting attraction are the Giant tortoises that shuffle through the trees, with the patience that old age brings you. Originally thought to be from the Comoros Islands and Seychelles, some of these tortoises are said to be over 100 years old. Stately and lumbering, the tortoises have even been known to take children on a ride.

Lunch is available on the island and then you are left to your own pleasure. If you are feeling active, you can explore one of the hiking trails, snorkel in the crystal-clear waters in search of colourful tropical fish darting through the reef or soak up some sun on the powdery-white 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.