A half-day boat trip from Stone Town that pairs the giant tortoises of Prison Island with the wide sandbar and snorkel-friendly shallows of Nakupenda Beach. Sun, shallow reefs and local boat crews make this an accessible coastal adventure.
More ways to explore the area's outdoor wonders
You leave Stone Town's old concrete quay and the sea immediately changes tone — warmer, clearer, and intent on showing you a different rhythm. The boat slips past dhows and faded cargo vessels, the wind pressing your hair back as the city shrinks to a cluster of tin roofs and minarets. Prison Island (Changuu) appears first: a low limestone rim crowned by a grove of hard-leaved trees and the slow, patient forms of Aldabra giant tortoises.
Difficulty
easy
Duration
6–8 hours
Fitness Level
Minimal fitness required — short walks on sand and short swims/snorkels; able to board a small boat.
Wildlife
History
Prison Island served as a 19th-century quarantine station and later had structures tied to colonial-era administration; its name reflects past attempts to detain escaped slaves and prisoners.
Conservation
Tours should avoid touching coral, use reef-safe sunscreen, and support local guides who enforce tortoise welfare and reef protection policies.
Reserve your spot on the prison island and nakupenda beach today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Bring reef shoes
Rocky entries and sharp coral at both landing points make protective footwear useful for wading and snorkeling.
Use reef-safe sunscreen
Sun is strong and reefs are fragile — choose mineral-based sunscreen to protect both skin and coral.
Carry small cash
Vendors and guide tips are often cash-only; bring small denominations of Tanzanian shillings.
Watch the tide schedule
Nakupenda shows best at mid-to-low tide when the sandbar is exposed and snorkeling is clearer.
Reef or water shoes
Protects feet from sharp coral and rocks when entering the water.
summer
Snorkel mask (mask & snorkel)
Allows you to explore the shallow reef and see fish from Nakupenda's pools.
summer
Dry bag
Keeps phone, cash and sunscreen dry on a small boat.
Light long-sleeve shirt
Sun protection for the open deck and cooler mornings; quick-dry fabric is best.
spring