Lake Chagan (or Lake Balapan) Kazakhstan is a lake created by the Chagan nuclear test fired on January 15 1965 part of the Nuclear Explosions for the National Economy. Its water comes from the Chagan River. Often referenced as Atomic Lake the crater lake's volume is approximately 100000 m3 (81 acreft) and the lake is still radioactive although it has decayed to the point where people can swim in it. To the south the rim of the crater holds back the waters of a second reservoir. 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?
The answer to this question is:
Natural Place