Located in tambon Khorat, Prasat Muangkao or Arokayasala is a medical station built by the order of the Khmer ruler, King Jayavaraman VII (1181-1218). There were 102 medical stations built throughout the empire during his reign. They all have a similar layout with a small simple tower set in a rectangular enclosure with the entrance to the east. There is a square pond located in the northeast corner.