Lake Paiku - Lake Paiku (or Peiku) -- in Tibetan Paiku-Tso or -Tshois at 4591 meters (15070 ft) elevation on the Tibetan Plateau at 2855N 8535E 18 km south of the Yarlung Tsangpo (Brahmaputra) River. The lake is 27 km (17 mi) long and 6 km (3.7 mi) wide at its narrowest. It is surrounded by mountains reaching 5700 to 6000 meters (19 to 20000 ft). Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Natural Place