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. Mortsjon - Mortsjon (Swedish for Roach Lake) is a small lake in Huddinge Municipality south of Stockholm in Sweden. Part of the Orlangen Nature Reserve Mortsjon is also one of the smaller lakes of the Tyresan Lake System
Natural Place