Wat Khok Kaeo, or the Monastery of the Crystal Mound, is a ruin located off the main island in the southeast area of Ayutthaya, in the Ko Rian Sub-district.
Wat Khok Yai Luk (mound) stood north, Wat Sangkhawat (mound) east and Wat Song Kuson west. The ruin is one of the southernmost monasteries in the Ayutthaya City District.
A Ficus Religiosa or Bodhi tree engulfs elements of a brick structure. The structure situated on a small mound of collapsed bricks cannot be identified. A Buddha image has been placed on the mound, indicating that the location is sacred and worshipped.
The history and establishment of Wat Khok Kaeo are unknown.
The site is in geographical coordinates: 14° 19' 40.13" N, 100° 34' 37.78" E
