The city of Atlantis in Atlantis: The Lost Empire was inspired by Angkor Wat in Angkor, Cambodia. Though Atlantis was based on a legendary sunken Greek island that may or may not have existed, its visual inspiration is definitely real. Angkor Wat began as a Hindu temple and was later re-purposed as a Buddhist temple complex in the 12th century. In any case, it is the largest religious monument in the world!