Welcome to Prison Island (Changuu Island)

Experience Type: History, giant tortoises, short excursion
Best Season: Year-round
Guest Appeal: Day-trip guests, families, history lovers

Location and Context

Discover Prison Island, locally known as Changuu Island, just 5 km northwest of Stone Town—a quick 20–30 minute boat ride across Zanzibar’s turquoise harbor. At Tanzania Destination, we invite you to explore this unique island, where colonial history, wildlife encounters, and marine adventure come together. Once a quarantine station, today Prison Island is a favorite half-day escape for families, cruise guests, and anyone seeking a blend of heritage and nature.

Key Features

• Giant Aldabra tortoises: A sanctuary for tortoises gifted from the Seychelles in the early 20th century, some over 100 years old.
  
• Historic ruins: Remnants of the old prison and quarantine station, including cells and administrative buildings.
• Giant Aldabra tortoises: A sanctuary for tortoises gifted from the Seychelles in the early 20th century, some over 100 years old.
• Marine environment: Shallow reefs around the island suitable for snorkelling and swimming.
• Scenic boat ride: Short transfer from Stone Town with panoramic views of the harbour and coastline.
• Compact layout: Easy to explore in 2–3 hours, making it ideal for families and cruise passengers.
• Educational value: Insight into Zanzibar’s colonial past and conservation efforts for endangered species.

Why Visit Prison Island

With Tanzania Destination, your visit to Prison Island is a journey through time and nature. Explore colonial ruins, meet the famous giant Aldabra tortoises, and snorkel in crystal-clear waters—all in a single, easy excursion. The island’s close proximity to Stone Town makes it ideal for families, cruise guests, and travelers with limited time. Enjoy a relaxed, manageable visit packed with history, wildlife, and adventure.

Expanded Details (Deep Dive)

Historical Background

Prison Island was acquired by the British in the late 19th century. Initially, it was intended to house violent prisoners, but this plan was abandoned. Instead, it became a quarantine station for yellow fever and other infectious diseases. The ruins of the cells and administrative buildings remain, offering a glimpse into colonial medical practices and Zanzibar’s role in regional health management.

The Tortoise Sanctuary

The island is best known today for its population of giant Aldabra tortoises, originally gifted by the British governor of Seychelles in the early 20th century. The sanctuary protects these endangered creatures, some of which weigh over 200 kg and live more than a century. Visitors can walk among the tortoises, feed them under supervision, and learn about conservation efforts. The sanctuary is a highlight for families and wildlife enthusiasts.

Marine Environment and Snorkelling

Surrounding Prison Island are shallow coral reefs teeming with colourful fish. Snorkelling trips are often included in excursions, allowing visitors to enjoy marine biodiversity. The clear waters make it easy for beginners and children to participate.

Scenic Boat Ride

The journey to Prison Island is part of the experience. Traditional dhows or motorboats carry visitors across the harbour, offering views of Stone Town’s skyline, the House of Wonders, and the Old Fort. The short transfer is safe and enjoyable, adding to the excursion’s appeal.

Appeal to Different Guests

• Families: Children enjoy interacting with giant tortoises and exploring ruins.
• Cruise passengers: Short duration makes it ideal for limited shore time.
• History lovers: Colonial ruins and quarantine station provide educational value.
• Adventure travellers: Snorkelling and boat rides add excitement.
• Photographers: Tortoises, ruins, and harbour views offer diverse subjects.

Practical Information

• Duration: 3–5 hours including boat transfer.
• Best time: Year‑round; mornings are cooler and seas calmer.
• Accessibility: Easy boat transfer from Stone Town; suitable for most ages.
• Etiquette: Respect tortoises by following guide instructions; avoid littering or damaging ruins.

Conclusion

Prison Island (Changuu Island) is a compact yet diverse destination, blending colonial history, wildlife conservation, and marine adventure. With Tanzania Destination, you’ll leave with vivid memories of giant tortoises, historic ruins, and snorkeling in clear waters. For families, cruise guests, and history enthusiasts, Prison Island is a must-visit that delivers a complete Zanzibar experience in just half a day.

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