Dziani Boundouni is a crater lake located in Mohéli, Comoros, at an elevation of 138 meters above sea level. As one of the few freshwater lakes in the archipelago, it is believed to be linked to subterranean volcanic activity. The lake's unique limnological characteristics suggest a potential connection to the ocean. Although no large animal species inhabit the area, the lake supports a rich variety of birdlife, making it a significant breeding site for local endemics. Accessible through guided tours, Dziani Boundouni offers a tranquil experience for those who venture to explore its pristine waters, though reaching it requires private transport and a guide.