Neak Pean ('The entwined serpents') is an artificial island with a Buddhist temple on a circular island in Preah Khan Baray built during the reign of King Jayavarman VII. A baray is an artificial body of water.

The central pool represents the Himalayan Lake Anavatapta; located at the summit of the universe; which was believed to give birth to the four great rivers of the world. These four rivers are represented at Neak Pean by four gargoyle-like heads which; when opened; would permit water to flow from the main pool to the four smaller pools.