Tortoises on a tiny island near Stone Town. This guided trip to Prison Island (Changuu Island) mixes Aldabra giant tortoises with a surprising backstory, plus a smooth speedboat ride over clear water. I also really liked how the guides bring it to life—Omar’s energy and storytelling make the history feel human, not like a lecture.

One key consideration: the advertised tour price is only the start. The entrance fee is extra ($22 per person), and if you want snorkeling gear or a specific swim setup, those add-ons can raise your final total quickly.

Key highlights at a glance

• Aldabra giant tortoises up close: some over 200 years old, plus clear rules so you can see them responsibly
• Speedboat round-trip with a life jacket included and a fun, scenic approach from Stone Town
• Colonial-era ruins to explore even though the island was never used for criminal prisoners
• Optional snorkeling in calm, clear water with marine life around the island
• White sand and relaxation time—go earlier if you want more space on the sandbank
• Stone Town views across turquoise water for photos that actually look like the postcards

Prison Island, aka Changuu: what the name means

Prison Island is also called Changuu Island, and the name can mislead you fast. The island wasn’t used as a prison for criminals. In the 1860s, it worked as a detention center for rebellious slaves, and in the 1890s the British later built a prison there—but it was used as a quarantine station for yellow fever patients rather than a penal colony.

That twist matters because it changes how you experience the place. You’re not just ticking off a tortoise photo stop. You’re stepping into a location shaped by Zanzibar’s history of conflict, disease control, and colonial power—then spending a few hours in a calm nature reserve environment.

Your local guide ties these pieces together while you move through the island. And that makes the ruins feel purposeful: you understand what you’re looking at, instead of just seeing old stones and guessing.

Getting there from Stone Town Beach: speedboat timing and meeting points

This is built for a half-day outing. The tour runs about 3 hours and starts from Stone Town Beach near Forodhani Gardens. There are two options:

• Morning: 9:00 a.m. – 12:30 p.m.
• Afternoon: 1:30 p.m. – 5:00 p.m.

Meeting points depend on where you’re staying. If you’re a hotel guest, pickup from your hotel in Stone Town is included. If you’re farther out in Zanzibar, pickup may cost extra. If you’re not being picked up, plan to meet at Cape Town Fishmarket in Stone Town.

The trip is by speedboat for the round-trip ride, and you get a life jacket included. That’s a big comfort factor in general—especially if you’re not used to being on small boats. Also, you’ll have water provided, which helps you stay comfortable once you’re out in the sun.

One small reality check: since this is a time-limited trip, the schedule rewards visitors who stay flexible. If you arrive with everything ready (towel, sun protection, swimwear), you waste less time and enjoy more island time.

Aldabra giant tortoises: the reason to come early

The star of Prison Island is the Aldabra giant tortoises. Many are over 200 years old, and that age shows in the pace of their world—slow movement, steady breathing, and a calm confidence that makes you forget you’re on a small island near a major city.

What I like most is how straightforward the experience is. You’re close enough to see them clearly, and you’re reminded to respect their habitat. Your guide’s instructions matter here. The tortoises are not props. If you follow the rules and keep your distance where asked, you get better sightings and a more respectful visit.

A practical tip from the vibe on the island: go earlier if you want a more relaxed sandbank setup. In the afternoon, the sandbank can get covered, so earlier hours tend to feel roomier for sunbathing and lingering.

If you’re a person who likes wildlife but gets annoyed by rushed handling, this is a good match. You spend time watching the tortoises move at their pace, not performing for yours.

Prison ruins and quarantine history: more than a photo stop

Once you’ve seen the tortoises, the island’s historic side is where the guided tour feels most valuable.

You can visit the remains of the 19th-century prison, and you learn how the island role shifted over time. Even with the famous name, the story doesn’t center on violent prison life. It focuses more on confinement and public health—first detention for rebellious slaves, then a quarantine station for yellow fever patients during British involvement.

I like this part because it helps you connect Zanzibar to wider global history without turning it into a dry museum-style stop. You get context while standing in the actual place, with your guide pointing out details you might otherwise overlook.

If you’re the type who usually skips history on island trips, give this segment a chance anyway. The ruins are small, but they carry weight, and your guide makes the meaning clear.

Snorkeling and marine life: what you can realistically expect

The waters around Prison Island are clear, and there’s marine life right off the island. Snorkeling is optional, and you’ll have a life jacket included regardless.

Here’s the practical side: snorkeling works best if you come prepared. Swimming equipment isn’t included, and snorkeling gear is listed as $3 if you need it. You can also bring your own.

Your guide will keep things respectful—don’t touch marine life or coral. That conservation rule is important in shallow water, because it’s easy to accidentally step on something or brush coral with a fin or hand.

If you love color and movement in the water, you’ll likely enjoy the snorkeling segment. But if you’re nervous about getting in the water, you can treat it as a gentle bonus rather than a must-do. The beach time stays the anchor either way.

Sandbanks, sunbathing, and the Stone Town view

After tortoises and history, you get the relaxing part: white sandy beaches, sunbathing, and time to unwind.

You’ll often see the turquoise water of the Indian Ocean in the background, and the island offers a panoramic view of Stone Town. That view is a real mood shift—Stone Town can be busy, while the island feels slow and bright.

One reason this part works: it’s not trying to be an all-day resort setup. You’re not stuck in a long line of attractions. You get a few good hours where you can do one or two activities well, then settle into the sand.

Bring a towel and change of clothes if you plan to swim or snorkel. Also pack sunscreen and a hat. Sun + salt air can catch you off guard, especially if you linger for photos.

Price and logistics: what $35 really covers

The tour price is $35 per person, but here’s how value adds up in real life.

What’s included:

• Water
• Speedboat return trip
• Life jacket
• Snorkeling (optional)
• Local tour guide

What’s not included:

• Entrance fee: $22 per person
• Food
• Snorkeling gear (listed as $3)
• Transportation from the hotel to Stone Town can cost extra if you’re not already in Stone Town

So, if you’re budgeting, think of the $35 as paying for the guided experience and boat logistics, then factor in the entrance fee as the main extra cost. If you snorkel and don’t bring your own gear, add the snorkeling equipment cost too.

Is it still good value? In my view, yes—because you’re getting a guided visit to a wildlife reserve with a historical site, plus the boat ride that would be a hassle to coordinate alone. If you were only going for a beach and tortoise photos, you might question the total. But once you factor in the history and the organized access, it feels more justified.

Guides matter: Omar, Abdul, and the local touch

This tour leans heavily on the guide experience. The most praised tours have one thing in common: the guide makes the time feel fun and understandable.

I’d especially watch for names like Omar, who brings both information and a lively vibe to the trip. Another highlight in the same spirit is Abdul, praised for clear explanations and French language skills, plus the way he gives you freedom to wander and feel at ease. And there’s Regalo, noted for being super helpful and friendly.

Even if you don’t speak the guide’s language, you’ll usually get the core message: how to move safely around tortoises, how to respect the snorkeling conservation rules, and what the island ruins mean. That’s the difference between a passive visit and a genuinely satisfying one.

What to bring (and what Zanzibar will not allow)

This island day is simple, but it’s strict in the right places. Here’s what you should pack:

• Sun hat and sunglasses
• Swimwear and a change of clothes
• Towel
• Camera
• Beachwear
• Cash (useful to cover entrance fee and any small extras)
• Passport (a copy is accepted)
• Snorkeling gear if you have it

What’s not allowed:

• Pets
• Weapons or sharp objects
• Oversize luggage
• Plastic bags
• Alcohol and drugs
• Jumping
• Making fire
• Bare feet

That last set matters if you tend to travel light without thinking. Bring closed-toe footwear for getting around safely, then switch to sandals later if permitted.

Who this tour suits best (and who should skip it)

This is a great fit for:

• Wildlife lovers who want tortoises up close and in a respectful setting
• People who enjoy short, well-timed outings
• Anyone who wants both relaxation and a bit of history in the same half-day

It’s not listed as suitable for:

• Pregnant women
• People with mobility impairments
• People with heart problems

Also, because it’s a speedboat trip and a beach setting, you’ll want to be comfortable with sun exposure and getting in and out of the water if you snorkel.

If you’re prone to motion sickness, you might want to be cautious with any boat segment, but that specific concern isn’t stated here. Still, it’s worth considering based on your own body.

Should you book Prison Island with a local guide?

Yes, if you want an efficient, guided way to experience Aldabra giant tortoises, short snorkeling time, and a history stop that actually connects to Zanzibar’s past.

Book it early in the day if your top priority is a relaxed sandbank atmosphere. Choose the afternoon slot if you prefer a slower start and you don’t mind that the sandbank can be more covered later.

Don’t wait until the morning to think about total costs. The $35 is not the whole picture once you include the $22 entrance fee and any snorkeling gear needs.

If you like trips where the guide adds clarity and personality—like the Omar and Abdul-style experiences you can expect—this one tends to land well.

FAQ

How far is Prison Island from Stone Town?

Prison Island (Changuu Island) is about 5.6 km northwest of Stone Town.

Where do I meet for the tour?

For non-hotel guests, meet at Cape Town Fishmarket in Stone Town. For hotel guests, pickup from your hotel in Stone Town is included, with additional charges possible if you’re outside Stone Town.

What time does the tour run?

There are two departures: 9:00 a.m. to 12:30 p.m. and 1:30 p.m. to 5:00 p.m. The total duration is about 3 hours.

Is the entrance fee included in the $35 price?

No. The entrance fee is $22 per person and is not included in the $35 tour price.

What’s included in the tour?

Included items are water, the speedboat return trip, a life jacket, snorkeling (optional), and a local tour guide.

Is snorkeling equipment included?

Snorkeling is optional, but swimming equipment is not included. Snorkeling gear is listed as $3 if you need it.

What should I bring for the day?

Bring sunglasses, a sun hat, swimwear, a change of clothes, a towel, a camera, and cash. A passport copy is accepted.

Is the tour suitable for everyone?

It’s listed as not suitable for pregnant women, people with mobility impairments, and people with heart problems.

What happens if the weather is bad?

If weather conditions are unsafe, the tour may be postponed for safety reasons.