Tortoises and prison walls on one small island. A half-day trip from Zanzibar City takes you out by boat to Changuu (Prison Island), where you can spot Aldabra giant tortoises and walk the leftover Prison ruins from the late 1800s. What I like is that it is not just a quick photo stop: your private guide steers the visit so you understand why the tortoises are there and what the old prison was built to do.

The tour also keeps things moving, with time to look for other island animals like peacocks and antelopes, then cool off with a swim if conditions allow. One thing to consider: swimming can be trickier than photos suggest, because the main beach area is small and you may see lots of boats during the same window. And if weather turns, the outing may be shorter than the full half day.

Key things to know before you go

• Boat time is part of the experience: expect about 25–30 minutes by wooden motorized boat from Stone Town’s area.
• The island has a clear theme: you are visiting the 1893 prison site and the tortoise sanctuary, not a resort beach.
• Aldabra tortoises are the highlight: you come for these big, real animals you can actually observe up close.
• Wildlife sightings can happen: peacocks and antelopes are part of the visit.
• Swimming is optional and weather-dependent: you might swim from the beach, but crowd and conditions matter.

Getting to Changuu (Prison Island) from Zanzibar City

This is set up as an easy half-day day trip. You get private transportation with pickup offered, and bottled water is included, so you can focus on the island rather than logistics. The ride to the harbor and the return back to Stone Town keep the whole schedule tight.

Then comes the boat hop. Prison Island sits about 16 km from Stone Town, and the crossing is usually about 25–30 minutes by wooden motorized boat. That short travel time is a big part of why this tour works well for a half day: you are not losing most of your day to transit.

If you care about timing, I suggest you pay attention when the tour leaves. On an island like this, your experience will feel better if you arrive when the boats aren’t piling in as thickly right at the start of the beach time.

Changuu Island: the 1893 prison ruins you actually walk through

Changuu is best understood as a place where two stories overlap: confinement and conservation. The prison side is tied to the ruins built in 1893 by General Lloyd Mathews. Your guide brings the context so it is not just random crumbling walls.

Walking through prison ruins on an island is a strange feeling in the best way. You see how a remote island can function as a holding place, and you get a real sense of separation from the mainland. It also helps explain why the rest of the island shifted over time toward wildlife sanctuary work.

One practical note: the ruins are a “look and learn” stop, not an all-day archaeological dig. This kind of site tends to work best when your guide points out what you should notice and keeps the pace moving toward the tortoises.

Aldabra giant tortoises: why this sanctuary is the main event

If you are deciding between this and a tour that just focuses on beaches, go where the tortoises are. This is where the value concentrates.

Your visit includes the sanctuary of Aldabra giant tortoises, brought to Zanzibar by the governor of Seychelles as a gift to the Sultan of Zanzibar. The tour information points to 1915 in one place, while the tour outline also mentions 1919—so expect the explanation to cover the early 1900s gift story rather than a modern-day setup. Either way, the important part for you today is simple: these are real tortoises, and the visit is timed for you to observe them and take pictures.

What makes the tortoises feel special here is how direct the encounter can be. You are not just seeing them from a distance. You get time to watch them move slowly, shell by shell, and you can feel the contrast between the prison ruins and these calm, long-lived animals.

This also matches the overall tone of feedback: when people leave most satisfied, it is usually because the tortoises were real and fascinating rather than because of the beach or other activities.

Wildlife beyond tortoises: peacocks and antelopes

You should go with the right expectations. This is not a full safari on land. Still, the island does have other creatures that can make your walk feel like a living sanctuary.

The tour highlights that you may spot peacocks and antelopes during your time on the island. You may not see every animal every visit, but the fact that the tour is built around wildlife spotting is meaningful. You are not trapped in a single photo zone the whole time.

Bring the mindset of a wildlife watcher: slow down, look around, and let your guide know you want a chance for sightings before the group moves on.

Swimming from the beach: crystal water, but plan for reality

Yes, you have a chance to swim in the crystal clear water from the beach. That is part of the appeal. But treat this as a bonus, not your guaranteed main attraction.

Here is what I would tell you to expect based on the common reactions: the beach area is small, and there can be multiple boats at once. That means the water can be crowded right when you arrive, and it can reduce how enjoyable it is to linger in the swim zone.

If swimming is important to you, do this:

• Ask your private guide for the best window or spot to get in.
• Be ready to accept that you may swim briefly rather than settle into a long beach hang.

Also, note the practical tradeoff: if your goal is snorkeling for long stretches, Prison Island is not marketed as a big snorkeling destination in the way some other tours are. The island experience is mainly about tortoises and ruins, with swimming as the optional add-on.

How long you’ll be out there and what half-day means in practice

On paper, this is 2 to 3 hours. In reality, your experience depends on how the day unfolds. Weather matters here. The tour is described as requiring good weather, and one review outcome showed a shorter excursion when conditions were not ideal.

So think of it like this: the schedule is compact by design. You boat out, do the ruins and sanctuary visit, check wildlife, then you are back. If the day is smooth, it fits nicely into a Stone Town itinerary. If weather shifts, you might get closer to the shorter end of the range.

One more thing that helps: since you have a private guide, ask for a quick time check early. If it’s looking like the day might shorten, you can adjust so the tortoise viewing and ruins are never rushed.

Price of $84 per person: is it good value?

At $84 per person, this is not the cheapest Zanzibar activity. But value depends on what you compare it to.

You are paying for a package that includes:

• private transportation
• private guide
• bottled water
• all fees and taxes
• a mobile ticket

That matters on an island day trip, because the cost of boats, guide time, and entry handling adds up fast when you do things on your own. Also, this being a private tour means you’re not sharing a guide’s attention with strangers, which can improve the experience when you want to understand the prison history and still have time for tortoises and photos.

Where the price can feel less fair is when the weather forces a shorter visit. If you end up with only about 1.5 hours due to conditions, the per-minute cost feels sharp. Still, the good side is that the tour states you can be offered a different date or a full refund if the experience is canceled due to poor weather, which reduces the risk of paying and getting stuck on an off day.

Who should book this private Prison Island tour?

This is a strong match if you want an island outing with a clear purpose. You will probably enjoy it if you:

• love seeing Aldabra giant tortoises up close
• like quirky, place-based history like an actual prison ruin site
• prefer a guided explanation over wandering on your own
• want a short trip that fits into a Zanzibar City or Stone Town day

It is less ideal if you mainly want a long, quiet beach day or you expect a full snorkeling-style afternoon. The beach is part of the plan, but it’s not the core of the experience.

Because it is private, it is also a smart pick for couples and small groups who want flexibility with pacing. Your guide can keep the flow moving so you do not feel stuck watching only what happens to be most convenient for a big group.

Should you book Zanzibar Crystal Tours & Safaris?

I would book this if your priority is the sanctuary and the ruins, not a beach resort day. The tortoises are the anchor, and the inclusion of a private guide and transport makes the half-day format feel practical.

Before you book, ask yourself two quick questions:

1) Do you want to learn something and walk through a specific site, not just hang out at the shore?

2) Are you okay with swimming being optional and sometimes limited?

If your answers are yes, this tour is likely to feel worth it. If your answers are no—especially if you are chasing a big beach day—then you might prefer a different kind of Zanzibar water-and-sand outing.

FAQ

How long does the Prison Island private tour take?

The tour is listed as about 2 to 3 hours.

What does the tour include?

It includes private transportation, a private guide, bottled water, and all fees and taxes. You also get the included experience visits on the island.

Is pickup offered?

Yes. Pickup is offered, and it is operated as part of the private transportation.

What are the main things you’ll see on Changuu (Prison Island)?

You’ll visit the prison ruins built in 1893 and the sanctuary of Aldabra giant tortoises, with time to spot other species such as peacocks and antelopes.

Can I swim during the tour?

You have a chance to swim from the beach on the island, but it depends on conditions during your visit.

What happens if weather is bad?

The experience requires good weather. If it is canceled due to poor weather, you’ll be offered a different date or a full refund.

If you tell me your travel month and whether swimming or photos are your top priority, I can help you decide whether this one is the right fit for your exact day in Stone Town.