Lake Nemrut on the southern slope of the caldera in 2007. The main thread in terms of ecology is overgrazing. Lake Nemrut Lake Nemrut () is a freshwater crater lake in Bitlis Province, eastern Turkey. It is part of Nemrut Caldera (), a volcanic caldera atop Volcano Nemrut. The caldera is a registered natural monument and the wetlandsis registered as a Ramsar site of the country. The caldera is located west of Lake Van in the Tatvan, Ahlat and Güroymak districts of Bitlis Province. It is named after the biblical figure King Nimrod. The caldera is far from Tatvan, and from Ahlat.
Nemrut (volcano) discovered that Nemrut played an important role in the life of the first civilizations. Despite the abundance of obsidian sources in Anatolia and Iran, Nemrut was the main source of obsidian – the most important material of the Stone Age – for all settlements in Mesopotamia and the settlements of the Mesolithic era around the Dead Sea. The analysis of obsidian products revealed that the population of those areas used obsidian from only two sources: Nemrut and the nearby dormant volcano Bingöl. An ancient center of obsidian processing and trade was found at Lake Van, which was part of one