Just a short boat ride from the bustling streets of Stone Town, Zanzibar lies Prison Island, locally known as Changuu Island. Despite its small size, this island offers a rich blend of history, wildlife, and natural beauty, making it an ideal day-trip destination for families, couples, and adventure travelers. At Mountains 2 Marshes Expeditions, we ensure your visit to Prison Island is seamless, informative, and tailored to your interests.

From ancient stone ruins to gentle giants grazing freely, Prison Island captures the essence of Zanzibar’s heritage while offering a serene escape into nature.

A Glimpse of Prison Island’s History

Developed in the late 19th century by the Sultan of Zanzibar, Prison Island was intended as a detention center for rebellious slaves and later served as a quarantine station. While it never functioned fully as a prison, the remaining stone buildings offer a window into Zanzibar’s complex history, blending colonial influence and local heritage. Walking among these structures provides context to the island’s intended purpose and a sense of the past preserved in stone.

Wildlife Encounters

The island is most famous for its giant Aldabra tortoises, some of which are over 100 years old. Visitors can observe them roaming freely, learn about their care and conservation, and even feed them under guided supervision. These gentle creatures are among the largest tortoises in the world, weighing up to 250 kilograms, and provide an unforgettable wildlife encounter.

Natural Beauty and Activities

Beaches and Swimming
Prison Island’s white sandy beaches and shallow lagoons are perfect for swimming, sunbathing, or simply relaxing. The calm waters near the shore also provide safe spaces for beginners to snorkel or paddle.

Snorkeling and Marine Life
Coral reefs surrounding the island are teeming with tropical fish, starfish, and occasional rays. Snorkeling trips are a popular activity, offering a brief underwater adventure that highlights Zanzibar’s marine biodiversity.

Guided Tours and Photography
A guided tour provides insight into the island’s history, wildlife, and conservation efforts. Photography enthusiasts can capture scenic views, historical structures, and tortoises in their natural habitat.

Planning Your Visit

Best Time to Visit

• Dry seasons (June–October, December–February): Ideal for sunny skies, calm seas, and swimming.
• Avoid March–May: Heavy rains may disrupt ferry transfers and outdoor activities.

Getting There
Prison Island is accessible via a short 20–30 minute boat ride from Stone Town. Most tours include round-trip transfers, guided tours, and optional snorkeling, allowing for a convenient half-day excursion.

Suggested Essentials

• Light, breathable clothing suitable for tropical weather.
• Swimwear, towel, and reef-safe sunscreen.
• Comfortable shoes or sandals for walking on uneven terrain.
• Camera or smartphone for photos.
• Small backpack with water, snacks, and personal items.
• Optional snorkeling gear if not provided by the tour.

Safety and Etiquette

• Follow instructions from guides, especially near wildlife and ruins.
• Maintain a safe distance from tortoises and feed them only approved food.
• Avoid climbing on ruins or disturbing fragile areas.
• Respect the environment by not leaving trash behind.
• Swim only in designated shallow areas if inexperienced.

Duration and Tour Options

Half-Day Trip: 2–3 hours including boat transfer, island tour, wildlife observation, and optional snorkeling.
Full-Day Trip: 4–6 hours with extended beach time, snorkeling, picnic options, and more in-depth guided exploration.

Guided tours can be arranged for private groups or combined with other Zanzibar experiences such as spice farm visits or Stone Town walking tours.

Why Choose Mountains 2 Marshes Expeditions

At Mountains 2 Marshes Expeditions, we provide personalized, eco-conscious excursions to Prison Island. Our guides offer historical insights, ensure wildlife interactions are safe and respectful, and help visitors maximize every moment of their trip. Whether your focus is history, wildlife, snorkeling, or photography, our team ensures a smooth, memorable experience in this Zanzibar gem.

Prison Island is a compact treasure of Zanzibar, where history, wildlife, and natural beauty converge. With careful planning, respect for local ecosystems, and expert guidance from Mountains 2 Marshes Expeditions, your visit will be safe, enriching, and unforgettable—a perfect addition to any Zanzibar itinerary.