Neak Pean is a Buddhist temple-island complex constructed as an oasis of peace and reflection during the reign of Jayavarman II. Neak Pean stands on an artificial island surrounded by ponds. Some say that Neak Pean was constructed as part of a hospital or designed as a Khmer spa where people with illnesses come to bathe at the ponds to re-attain their natural balance with nature. The best time to visit Neak Pean is just after the rainy season, that is, October and November when the ponds are filled with water.