Visitors to Wat Si Chum will be especially impressed by the mondhop: a huge, windowless cuboid construction that stands on a high pedestal. Inside, you'll find the colossal statue (nearly 15 m high) of a seated Buddha. This impressive likeness is probably the PhraAchana mentioned in an inscription by King Ramkhamhaeng in 1292, reinforcing the ancient character of this wat and the surrounding ruined city.
A bot in front of the mondhop still has 13 limonite columns covered in stucco work. North of the mondhop are the ruins of a small wiharn and a brick building that contains a seated Buddha.