Please answer the following question: Pick one category for the following text. The options are - company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work. Lake Arpi - Lake Arpi (Armenian: ) is located in the Shirak Province of Armenia in the northwestern part of the country. The lake level is at an altitude of 2023 m. The lake area is 22 square kilometres. The area was increased artificially in the 1950s from the natural state of 4.5 square kilometres and the lake has become the second most important water body of Armenia next to Lake Sevan. It is used for irrigation and hydropower production.
A:
Natural Place