Neak Pean
Khmer Empire, Cambodia
Neak Pean (or Neak Poan) ("the entwined serpents") at Angkor, Cambodia is an artificial island with a Mahayana Buddhist temple on a circular island in Jayatataka Baray, which was associated with Preah Khan temple, built during the reign of King Jayavarman VII. It is the "Mebon" of the Preah Khan baray (the "Jayatataka" of the inscription).
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).