It is a boat trip tour to Changu Island which is currently known as Prison Island. It is 20 to 30 minutes trip from Stone Town city. Around the island, you will have a great chance to see the tortoise’s empire. Meaningfully, you will see face to face the giant Aldabra tortoises and some of them are over 100 years. You will also learn the island’s history as a prison for slave and later for political prisoners. After walking around the island and discovery, you will have a grand occasion to enjoy the beautiful beach and potentially snorkeling or swimming in the surrounding transparent blue water.