Please answer the following question: Thumb Lake -  Thumb Lake also known as Lake Louise by the Lake Louise Camp community is a kettle lake located in Hudson Township Charlevoix County Michigan. The epithet Thumb Lake derives from the lake's bathymetry. An islet protrudes from the lake's west basin. 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