A half-day-to-day boat trip from Stone Town that pairs historic Prison Island and its century-old Aldabra tortoises with the turquoise shallows of Nakupenda Sandbank. Expect snorkeling on living reefs, a beach seafood lunch, and tide-dependent sandbar lounging.
More ways to explore the area's outdoor wonders
A short skiff slips away from Stone Town's coral-studded harbor and the city noise thins into an uncomplicated rhythm of wind and wave. Within half an hour the shoreline loosens into open sea, and the boat rounds a tiny island where sun-bleached walls and palm shadows frame a colony of Aldabra tortoises that ambles like slow history itself.
Difficulty
easy
Duration
9 hours
Fitness Level
Suitable for most fitness levels; requires short walks on sand and basic ability to swim for snorkeling.
Wildlife
History
Prison Island was built in the 19th century as a quarantine and later held prisoners; its ruins and tortoise sanctuary reflect Zanzibar's colonial and trading-era past.
Conservation
Reefs around the sandbank are fragile—practice no-touch snorkeling, use reef-safe sunscreen, and support local guides who follow sustainable tourism practices.
Reserve your spot on the Prison Island & Nakupenda SandBank (Boat Trip) today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Watch the tide
Nakupenda's sand area changes with the tide — morning and mid-afternoon low tides give the largest sandbank for walking and sunbathing.
Use reef-safe sunscreen
Coral reefs are sensitive; choose reef-safe sunscreen and rinse off before snorkeling to reduce chemical impact.
Bring small cash
Vendors and small purchases on return to Stone Town sometimes require cash for tips or souvenirs — have small notes available.
Plan for seasickness
Rough weather can make the crossing choppy — if you’re prone to motion sickness, take preventative meds before departure.
Reef-safe sunscreen
Protects skin and the coral ecosystems while spending extended time on the sandbank and snorkeling.
Light water shoes
Useful for walking on coral fragments and hot sand when moving from boat to shore.
Wide-brim hat & sunglasses
Provides sun protection during beach time and boat crossings.
Light travel towel / quick-dry towel
Compact for drying off after swims and for sitting on the sandbank during lunch.