A home to giant land tortoises and a perfect place for snorkelling and perfect picnic spots. Changuu Island was used as a penitentiary for rebel slaves by the sultans from the 1860s until the end of the slave trade. The island is a popular day-trip destination from Stone Town. About 20 minutes from the city by traditional Dhow sailing boat, the island offers excellent snorkelling, a beautiful and quiet white sandy beach, giant turtle sanctuary and coral rag forest. One can take the footpath through the woodland, spotting birds, bats, various butterflies and duiker antelope .