About the location (from here):
Located in the vicinity of Bangkok, this 200-acre park on Si Nakharin Road commemorates His Majesty King Rama IX’s 60th birthday in 1987. In the large compound visitors can park and take a long walk in the area which comprises botanical gardens, and a building displaying the works and life of King Rama IX. A lake with clean water is in the middle of the area, also the landscape is beautifully decorated with many kinds of flowers. Refleshment booths are provided at many spots, and a restaurant by the lake offers good foods and nice breeze when sitting outdoor. During December of each year the park is decorated with large amount of flowers.

Movies shot at this location:
Garuda Garuda from Natpukkaaga
Naane Nee Nee Nee from Good Luck
InbamaE Unthan Paer PenmaiyO from Mariyadhai