Excursion to Mange Sandbank, The Mange Sandbank is in the southern part of the Mafia Archipelago. It has the cleanest, whitest sand in the clearest blue water. It’s only visible at low tide, and tropical reefs full of fish and colorful corals circle it. You have to sail for an hour and a half across the Indian Ocean to get to the sandbank. Once you get there, you can dive or snorkel over the Mange Reefs. A Swahili fish BBQ will be set up on the beach. The best high-class barefoot experience!