Mangapwani coral cavern and slave chamber

A scramble into a dark coral cavern — and a sobering memorial to the slave trade. North of Stone Town, stone steps lead down into Mangapwani's coral cavern, a big dark chamber lit by shafts of daylight. Local guides lead you along slippery, scrambling routes with a few squeezes to a freshwater pool at the bottom. A few kilometres up the coast, the slave chamber is a cell cut into the coral rock, reportedly built around 1880 to hide enslaved people after the trade was banned. It's a short visit, beside a modern memorial. How to book: Take a taxi from Stone Town (30–40 minutes) or join a north-west day tour; local guides wait at the cavern. Expect a small cash entry and a tip for the guide.