Bongoyo Island

Bongoyo Island is a protected, uninhabited island under the Dar es Salaam Marine Reserve with the IUCN category II located within Kinondoni District of Dar es Salaam Region in Tanzania. The island situated 2.5 km north of the country's largest city, Dar es Salaam in the Sea of Zanj. It is the most frequently visited of the four islands of the Dar es Salaam Marine Reserve System and a popular daytrip for both tourists and Tanzanian residents alike for snorkelling and sunbathing. North of the island is Mbudya Island and to the west is Pangavini Island. The island is home to some of Tanzania's largest specimens of endangered coconut crabs.

Source: Wikipedia