A group of islands and islets some 25 miles off the Tanzanian coast, the Zanzibar Archipelago is headlined by Unguja (often referred to simply as Zanzibar) and Pemba. Once a separate nation, Zanzibar has a long history of trade with the Arab world, dating back to at least the 11th century. The capital, Stone Town, is a UNESCO World Heritage Site and has many interesting historic attractions. Zanzibar's bright white beaches and nearby coral reefs make it very popular with the sun and sea set.