If you’re planning a beach holiday in Zanzibar, one excursion you absolutely shouldn’t miss is Prison Island Zanzibar also known as Changuu Island. Famous for its giant Aldabra tortoises, crystal-clear waters, and fascinating history, this small island offers the perfect half-day adventure from Stone Town.
In this complete guide, KiliPath African Safari explains everything you need to know about visiting Prison Island from history and tortoises to snorkeling and travel tips.
Where Is Prison Island?
Prison Island is located about 5–6 km northwest of Stone Town, the historic heart of Zanzibar Island.
A short 20–30 minute boat ride from Stone Town takes you to this beautiful tropical island surrounded by turquoise waters.
Why Is It Called Prison Island?
Interestingly, Prison Island was never actually used as a functioning prison.
In the late 19th century, the island was purchased by an Arab slave trader and later used by the British colonial authorities. Around 1893, a prison building was constructed, intended to hold rebellious slaves. However, it was eventually used as a quarantine station for people with yellow fever and other infectious diseases.
Today, the old prison building still stands and serves as a historical site and small museum that visitors can explore.
The Giant Tortoises of Prison Island
The biggest attraction on the island is its population of giant tortoises.
These tortoises were a gift from the Seychelles in the early 1900s. They are Aldabra giant tortoises one of the largest tortoise species in the world.
Fun facts about the tortoises:
- Some are over 100 years old
- They can weigh more than 200 kg
- They can live up to 150–200 years
- Visitors are allowed to feed them (with approved food)
Seeing these slow-moving giants up close is a unique experience, especially for families and wildlife lovers.
Snorkeling Around Prison Island
Beyond the tortoises, the island is surrounded by clear waters and vibrant coral reefs.
Snorkeling here is excellent thanks to:
- Shallow reefs
- Colorful tropical fish
- Calm waters (especially during dry season)
Many tours include snorkeling equipment, allowing you to swim just offshore and explore Zanzibar’s marine life.
If you’re combining your visit with a longer beach holiday, consider adding snorkeling trips to nearby areas like Mnemba Island for even more spectacular underwater experiences.
What to Expect on a Prison Island Tour
A typical Prison Island tour from Stone Town includes:
Boat transfer (round trip)
Entry fees
Guided tour of the prison building
Time with giant tortoises
Snorkeling time
Free time on the beach
Most tours last about 3–4 hours, making it a perfect half-day excursion during your Zanzibar stay.
Best Time to Visit Prison Island
The best time to visit is during Zanzibar’s dry seasons:
- June to October
- December to February
During these months, the sea is calmer and visibility for snorkeling is better.
For a complete Zanzibar planning guide, read our detailed overview of Zanzibar travel seasons and activities.
How to Get to Prison Island
There are two main ways to visit:
Join a Guided Tour (Recommended)
Booking through a trusted operator like KiliPath African Safari ensures:
- Safe, licensed boats
- Experienced local guides
- Smooth coordination
- Combined Stone Town + Prison Island tours
Hire a Local Boat
You can negotiate directly with boat captains at Stone Town harbor. However, prices vary and safety standards may differ.
How Much Does Prison Island Cost?
Costs typically include:
- Boat transfer
- Island conservation fee
- Guide fee
Prices may vary depending on:
- Private vs shared tour
- Group size
- Season
For accurate pricing and package options, contact KiliPath African Safari for updated rates.
Tips for Visiting Prison Island
Bring sunscreen and a hat
Wear light clothing
Bring swimwear and towel
Carry some cash for tips or small purchases
Bring a waterproof phone pouch
Combine Prison Island with Other Zanzibar Tours
To maximize your Zanzibar experience, combine Prison Island with:
- Stone Town historical walking tour
- Spice Farm Tour
- Dolphin Tour in Kizimkazi
- Snorkeling at Mnemba Island
Many travelers also combine a Zanzibar beach holiday with a Tanzania safari in the Serengeti or a Mount Kilimanjaro climb creating the ultimate Tanzania adventure.
Why Book with KiliPath African Safari?
At KiliPath African Safari, we specialize in:
- Zanzibar tours and beach holidays
- Tanzania safari packages
- Kilimanjaro climbing expeditions
- Customized Tanzania itineraries
We offer personalized service, professional guides, and seamless travel planning — from safari to sea.
Final Thoughts on Prison Island Zanzibar
Prison Island Zanzibar is more than just a historical site it’s a unique blend of history, wildlife, and marine beauty. Whether you’re feeding century-old tortoises, snorkeling over coral reefs, or exploring colonial ruins, it’s an unforgettable part of any Zanzibar itinerary.
If you’re planning your Zanzibar holiday, let KiliPath African Safari organize your Prison Island tour for a smooth and memorable experience.
Ready to Visit Prison Island?
Contact KiliPath African Safari today to include Prison Island Zanzibar in your custom Tanzania travel itinerary.
