Prison Island, also called Changuu, is a small island about 15 to 20 minutes by boat from Stone Town. It was built in the 1890s as a prison, but was used as a quarantine station instead, and its old stone buildings can still be explored.
Today it is best known for its giant Aldabra tortoises, first brought to the island from the Seychelles, and for the clear water around its beach.
What to do in Prison Island
- Meet and feed the giant tortoises, some of them more than a century old.
- Snorkel on the reef around the island.
- Explore the old prison and quarantine buildings.
- Relax on the small beach, with views back to Stone Town.
When to go
Prison Island can be visited all year. Mornings are cooler, and boats may stop in rough weather.
Getting there
Boats leave from Stone Town harbor and take about 15 to 20 minutes. A half-day trip is plenty.
Where to stay
Stay in Stone Town and visit as a half-day excursion.
Questions travelers ask
Can I touch the tortoises?
Yes, you can feed them and stroke their shells gently, as long as you follow the guides' instructions.
Can I swim at Prison Island?
Yes. There is a small beach and a reef for snorkeling. Bring a hat and water, as there is little shade.