Lake Nemrut the world. Nemrut Caldera is world's second largest one. The western half of the crater is covered by the lake. AT the summit, there are five lakes, two of them existing permanently and the others seasonal. The biggest of the lakes is Lake Nemrut in the form of crescent. It contains freshwater of colorless, odorless and drink water quality. Lake Nemrut is situated at an elevation of about above main sea level. It has an area of , and its average depth is about with a maximum depth of . Nemrut Caldera is on the youngest volcanic cone in Turkey,
Mount Batu Mount Batu Mount Batu is one of the highest of the Bale Mountains of Ethiopia, as well as of the Oromia Region. Part of the Bale National Park, and located at , it reaches an elevation of 4,307 meters. It consists of two peaks, Tinnish Batu ("Little Batu"), which is actually higher than Tilliq Batu ("Big Batu") to the south. The reason for these deceptive names is explained by Paul Henze, who reports that upon viewing them, "it appeared that the peak behind Tinnish Batu was definitely higher." The first European to climb Mount Batu was the Finnish professor Helmer