Oberaarsee is a reservoir in the Grimsel area part of the municipality of Guttannen Switzerland. The Oberaar glacier is located west of the lake. Its surface area is 1.47 km². The Oberaar dam was completed in 1953.It is drained by the Oberaarbach which flows into the Grimselsee. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
A:
Natural Place