Pasak Chonlasit Aquarium is a freshwater aquarium located within the scenic grounds of the Pasak Chonlasit Dam in Phatthana Nikhom District, Lopburi Province, central Thailand. The dam itself is the longest earth dam in Thailand and forms part of the Maenam Pa Sak Royal Development Project initiated by His Majesty King Bhumibol Adulyadej, who presided over its opening in November 1999. The aquarium showcases freshwater fish species native to the Pasak River basin, providing visitors with an educational window into local aquatic biodiversity. The broader dam precinct also offers a Pasak Basin museum, scenic trolley and train rides along the reservoir, kayaking, and camping areas, making the aquarium one component of a larger and rewarding natural and historical attraction. Open daily from 9:00 AM to 3:30 PM.
