Quick Answer: Choose Stone Town if you want history, architecture, markets and food in Zanzibar’s UNESCO-listed old town. Choose Prison Island if you want giant tortoises, a short boat ride and a swim. Each takes about half a day, and because the island is only 20–30 minutes by boat from Stone Town’s beach, most visitors do both in one day.
If you only have a day or two around Stone Town, you’ll keep seeing the same two names: the old town itself and Prison Island, the little island with the giant tortoises just offshore. Guests often ask me which one to pick, as if they were competing.
They aren’t really competitors. Stone Town vs Prison Island is a choice between two very different half days: one on foot through narrow streets full of history, the other on a boat to a quiet island with 100-year-old tortoises and a reef to swim on. Which is better depends on who you’re travelling with, how hot it is, how much time you have and what you enjoy.
In this guide I compare them side by side (time, cost, effort, what you see), tell you who each one suits best, and explain how we combine them so you don’t have to choose.
What Is the Difference Between Stone Town and Prison Island?
Stone Town is the historic old quarter of Zanzibar City, a UNESCO World Heritage Site explored on foot. Prison Island (Changuu) is a small island about 5–6 km offshore, reached by boat, known for its colony of Aldabra giant tortoises and the ruins of a 19th-century quarantine station.
What is Stone Town?
Stone Town is the old trading city at the heart of Zanzibar’s history: a maze of coral-stone houses, carved wooden doors, mosques, churches, bazaars and seafront gardens. UNESCO’s World Heritage listing describes it as an outstanding example of a Swahili coastal trading town, shaped by African, Arab, Indian and European influences. Our local walking guide to Stone Town covers every major sight in detail.
What is Prison Island?
Prison Island, or Changuu, is a small, green island facing Stone Town. Despite its name, the prison built there in the 1890s was never used for prisoners; it became a quarantine station instead. Today it’s best known for its giant tortoises, descendants of animals gifted from the Seychelles in 1919, and for the clear water around it. Our Prison Island guide tells the full story.
How Do Stone Town and Prison Island Compare?
Stone Town is longer, more walking and more history; Prison Island is shorter, involves a boat ride and is more relaxing. Here they are side by side.
Which costs more?
Prison Island costs more because it includes a boat and the island entrance fee. Our Stone Town Walking Tour runs $20–$50 per person depending on group size, while our Prison Island Tour runs $60–$80 per person, including the boat and entrance fees. Both include a professional guide and government fees, with hotel transfers available at extra cost.
Which is more tiring?
Stone Town, by some distance. You’ll walk 2–3 hours on narrow, uneven streets in city heat, with frequent stops. Prison Island involves a short boat ride (you step in and out at the beach, sometimes in shallow water), a gentle walk around the tortoise area and ruins, and optional swimming. For older travellers or anyone who struggles with heat, the island is the easier half day.
Which Should You Choose?
Choose by your interests and your group, not by which is “better”. Here is how I advise guests when they message us.
What if you’re travelling with children?
Prison Island is usually the winner for children under 12. Feeding and meeting the tortoises is a highlight, the boat ride is fun, and there’s a beach to swim at. Stone Town can be hard work for small children in the heat. If you do Stone Town with kids, go early, keep it short and finish at Forodhani Gardens, where the seafront is open and breezy.
What if you only care about history?
Then Stone Town is your priority. The former slave market and the exhibition at Christ Church, the Old Fort, the palaces and the merchant houses tell the story of the Swahili coast in a way nothing else on the island can. Prison Island has history too (the quarantine station and old buildings), but it is a short chapter compared with the town.
What about photography?
Both are wonderful. Stone Town gives you doors, alleys, rooftop views and street life; go early for soft light and fewer people. Prison Island gives you tortoises, turquoise water and a view back to the Stone Town skyline. Late afternoon on the boat back is lovely.
Can You Do Stone Town and Prison Island in One Day?
Yes, and it’s the way most of our guests do it. The boat to Prison Island leaves from the beach in Stone Town, so there’s no extra driving between the two. You can easily see both in a relaxed half to three-quarter day.
How does the combined day work?
- Morning in Stone Town, while it’s cooler: a guided walk through the main sights, markets and alleys.
- Midday boat to Prison Island from the beach near Forodhani, about 20–30 minutes.
- Tortoises, ruins and a swim on the island.
- Boat back in the afternoon and drop-off at your hotel, or stay in town for sunset and the Forodhani food market.
Our Stone Town & Prison Island Combo Tour runs exactly like this, with your guide, boat and entrance fees included. If you’d like a beach as well, the Stone Town, Prison Island & Nakupenda Sandbank Combo Tour adds a swim at a white sandbank that appears at low tide.
What about adding a spice farm?
That works too. The Spice Farm, Prison Island & Stone Town Combo Tour is a full day that covers Zanzibar’s three classic cultural experiences. It’s a busy day, but it’s ideal if you’re staying on the north or east coast and only want to make the trip to Stone Town once.
What Do Locals Recommend for Getting It Right?
A few small decisions make a big difference to how much you enjoy either experience.
What should you wear?
For Stone Town, cover your shoulders and knees; it’s a conservative, mostly Muslim town and you’ll be welcomed more warmly. For Prison Island, wear the same over your swimwear and bring a towel. Comfortable sandals or trainers are best for Stone Town’s uneven streets.
When is the best time of day?
Start Stone Town early, ideally by 9am, before the heat and the cruise and day-trip groups. Prison Island is pleasant at any time, but morning and late afternoon are calmer. Sea conditions are usually gentle on this sheltered side of the island year-round, though boats may be delayed in strong wind or heavy rain.
How do you end the day well?
Stay in Stone Town for sunset. You can watch it from the seafront for free, or from the water on a sunset dhow cruise, then walk to Forodhani Gardens for grilled seafood and Zanzibar “pizza” at the night market.
Frequently Asked Questions About Stone Town and Prison Island
Is Prison Island worth visiting?
Yes, especially if you enjoy animals, are travelling with children or want an easy, relaxing half day. The giant tortoises are calm and you can see them up close, the boat ride gives you a great view of Stone Town, and the swimming is pleasant. If you have very limited time and care most about history, prioritise Stone Town and add the island if you can.
How long do you need in Stone Town?
A guided walking tour takes 2–3 hours and covers the main sights. If you enjoy exploring, give yourself a full day or stay a night, so you can see the town early in the morning and at sunset when it’s at its most atmospheric. Many guests spend one or two nights in Stone Town at the start or end of their trip.
How long is the boat ride to Prison Island?
The boat ride from Stone Town’s beach to Prison Island takes about 20–30 minutes each way, depending on the boat and the sea. Most visitors spend 1.5–2 hours on the island. Including the boat, a Prison Island trip takes about 3 hours, which is why it fits so neatly with a Stone Town walk on the same day.
Can you swim at Prison Island?
Yes. There is a small beach and clear water around the island, and some trips include a short snorkel over the nearby reef when conditions allow. Bring swimwear, a towel and reef-safe sunscreen. Water conditions vary with the tide, so your guide will tell you the best time and spot to swim.
Is Stone Town safe for tourists?
Stone Town is generally safe for visitors, particularly during the day and with a guide. Keep valuables out of sight, use a crossbody bag, and politely decline unofficial “guides” who approach you in the street. At night, stick to busier, well-lit areas such as Forodhani Gardens and the seafront, or take a taxi back to your hotel.
Which is better for a short stopover in Zanzibar?
If you only have half a day, choose the one that matches your interests: Stone Town for history and culture, Prison Island for an easy, family-friendly outing. If you have a full day, combine them; it’s the best introduction to Zanzibar you can get in one day.
Do you need a guide for Stone Town?
You don’t strictly need one, but you’ll get much more out of it with one. Stone Town’s streets are confusing, many of its stories aren’t signposted, and a local guide takes you to places you’d never find alone. A guide also means you won’t be approached by touts all morning.
Final Thoughts
Stone Town vs Prison Island isn’t really an either-or decision for most travellers.
- Choose Stone Town for history, architecture, markets and food
- Choose Prison Island for giant tortoises, a boat ride and a swim
- Choose both if you have a day, since the boat leaves from Stone Town’s beach
- Go early for Stone Town, and stay for sunset and the Forodhani food market
Our guides grew up in and around Stone Town, and we’ll plan the day around the heat, the tide and your group. To book either tour, or the combined day, message us on WhatsApp at +255 773 315 736.
