Prison Island (Changuu)

Prison Island — officially named Changuu Island — lies just 5km northwest of Stone Town and makes for one of Zanzibar’s most popular half-day excursions. Despite its ominous name (it was originally intended as a prison, though never used as such), the island is a charming and historically rich destination famous for its colony of giant Aldabra tortoises.

Highlights

Historical colonial-era buildings and ruins

Excellent snorkelling in the surrounding reef

Sandy beach for swimming and relaxing

Yellow-fin tuna and parrotfish in the clear waters

Easy half-day trip from Stone Town — ideal for families

Historical insight into Zanzibar's colonial past

Giant Aldabra tortoises — some over 100 years old, weighing up to 200kg

Island at a Glance

Location

5km northwest of Stone Town, Zanzibar

Journey Time

~20 minutes by boat from Stone Town

Best For

Half-day excursion, families, snorkelling

Highlights

Giant Aldabra tortoises, historical ruins, snorkelling

Reviews

Prison Island (Changuu)