Prison Island, Zanzibar

Prison Island, also known as Changuu Island, is one of the most popular day-trip destinations from Stone Town, Zanzibar. Despite its ominous name, the island is now a peaceful, tropical escape famous for its beautiful beach, clear waters, and its population of giant tortoises. Originally intended to be a prison, the island has a rich and complex history, which adds to its charm. Today, it is a must-visit spot for those looking to combine history, nature, and relaxation in one scenic location.

How to Reach Prison Island, Zanzibar

Prison Island is located about 5.6 kilometers (3.5 miles) northwest of Stone Town. The only way to reach the island is by boat. Most visitors take a traditional wooden dhow or speedboat from the Stone Town waterfront. The boat ride takes approximately 20 to 30 minutes, depending on the weather and the type of boat used.

You can book a tour through a hotel, local guide, or travel agency, which usually includes transportation, entry fees, and sometimes snorkeling equipment. It is also possible to negotiate directly with local boatmen at the Forodhani Gardens or the harbor area in Stone Town.

Weather on Prison Island

Prison Island enjoys the same tropical climate as the rest of Zanzibar. The best time to visit is during the dry seasons – from June to October and from December to February. These months are perfect for beach activities, sunbathing, and snorkeling.

Temperatures typically range between 25°C (77°F) and 32°C (90°F). The wet seasons – March to May and November – can bring heavy rains, but short tropical showers are also common throughout the year. Always check the weather forecast before planning your trip, especially if you're heading out by boat.

Timing for Visiting Prison Island

Prison Island is open to visitors daily. There are no strict opening or closing hours since most trips are privately arranged, but the best time to visit is during daylight hours, ideally between 9:00 AM and 4:00 PM. This allows enough time to explore the island, relax, and return safely before sunset.

Early mornings and late afternoons are less crowded, especially during the high tourist season, and also offer better lighting for photography and cooler temperatures for exploring.

Why is Prison Island Famous?

Prison Island is famous for its giant Aldabra tortoises, some of which are over 100 years old. Originally gifted by the British governor of the Seychelles in the late 19th century, these tortoises are now protected and roam freely in a sanctuary on the island. Visitors can feed and interact with them under supervision.

Aside from the tortoises, the island is also known for its crystal-clear waters, coral reefs, and historical ruins. The beach offers great opportunities for snorkeling, swimming, and relaxing in a peaceful setting just minutes from the busy streets of Stone Town.

Entry and Visit Details About Prison Island

To visit Prison Island, you need to pay for a boat ride and a small entry fee for access to the island. Here’s a general idea of the costs:

• Boat ride (round trip): $30–$60 USD (depending on group size and negotiation)
• Entry fee: Around $4–$5 USD per person

Most tour operators bundle these costs into a package, which may also include a guide, snorkeling gear, and refreshments. It’s always best to confirm what’s included before booking. Remember to bring cash, as there are no ATMs or card facilities on the island.

History and Architecture of Prison Island

Prison Island was originally used as a coral mine and later intended to become a prison for rebellious slaves under the rule of Sultan Said Barghash in the late 1800s. However, the prison building was never used for this purpose. Instead, the British colonial government used the island as a quarantine station for yellow fever patients during the late 19th and early 20th centuries.

The original prison buildings still stand and can be explored by visitors. The main prison structure, with its thick coral-stone walls and iron-barred windows, is a reminder of Zanzibar’s colonial past. The architecture is simple but strong, blending local materials with British colonial design influences.

Things to Do at Prison Island

• Visit the Tortoise Sanctuary: Meet and feed the giant Aldabra tortoises, some of which are over 150 years old.
• Explore the Historic Ruins: Walk through the old prison buildings and learn about the island’s colonial and slave trade history.
• Snorkeling: Enjoy snorkeling around the coral reefs that surround the island. The waters are home to colorful fish and marine life.
• Relax on the Beach: Lounge on the soft white sand and swim in the calm, warm waters of the Indian Ocean.
• Photography: Capture incredible views of Stone Town from across the water and photograph the ancient tortoises and ruins.

Facts and Tips About Prison Island

• Fact: The oldest tortoise on Prison Island is believed to be over 150 years old.
• Tip: Bring sunscreen, a hat, and plenty of drinking water – there is limited shade and few facilities on the island.
• Fact: Despite being named Prison Island, it was never used as an actual prison for criminals.
• Tip: Wear water shoes or sandals if you plan to snorkel or explore rocky areas.
• Fact: The Aldabra tortoise is a protected species, and efforts are ongoing to preserve their population on the island.
• Tip: Respect the animals – feeding is allowed, but climbing or sitting on tortoises is strictly prohibited.

Conclusion

Prison Island is a fascinating destination where history, wildlife, and nature come together. Just a short boat ride from Stone Town, the island offers a refreshing contrast to the bustling city streets, making it a perfect half-day or full-day getaway. Whether you're visiting to meet the giant tortoises, explore colonial ruins, or simply enjoy a quiet beach, Prison Island promises a memorable experience. Its mix of education, adventure, and relaxation makes it one of Zanzibar’s must-see attractions.