Each of seven lakes there is an interesting ecosystem. All are rich with fish and birds, including many endemic species. The Lake of Langano is best manages as a place of tourism, there are few resorts there offering comfortable accommodation, tasty food and sports facilities. What keeps citizens of Addis Abeby and tourists coming for short and longer visits is the possibility to take a bath in the waters of the lake. Why? Langano is free of schistosomiasis. It is the only place in Ethiopia, and one of few in Africa free from this disease. It is because a specific water reaction.