Monoliths is a boat-access reef dive in Mikindani Bay near Mtwara. The site is built around coral columns and walls that rise sharply from deep water, so the dive feels dramatic even when you stay on the shallow top. It suits divers who want colorful coral, big reef structure, and a clear-water tropical profile rather than a flat, sandy route. Plan for a boat pickup, coral-aware buoyancy, and a dive that rewards controlled movement along the reef face.