Given the 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. Corregidor Caldera -  Corregidor is an extinct volcanic caldera located at the entrance to Manila Bay in the Republic of the Philippines. The caldera is composed of the islands of Corregidor and Caballo in the province of Cavite which are believed to be the exposed rim of the volcano.
The answer is:
Natural Place