Jozani Chwaka Bay National Park, Zanzibar Tanzania Jozani Forest is in the south of the island and is the largest area of mature forest in Zanzibar. A car will take you there, and a guide will walk you around the ancient hardwood forest and mangrove swamps. It is also home to the Red Colobus monkeys, unique to Zanzibar, with less than 2000 remaining in the world. A boardwalk around the mangrove swamp at the end of the tour is also included.