Prasat Him Phimai which is the largest sandstone sanctuary in Thailand.
It almost situated in the center of ancient Phimai city.
Its rectangular shape is 655 meters wide and 1,033 meters long.
Nowadays, the Sanctuary looks magnificently restored and renovated.
This fascinating ancient Khmer architecture has been preserved as the National Historical Park.
The monument itself is surrounded with two red sandstone walls.
The external wall and the gallery are punctuated by gate towers (Gopura) at four cardinal points, North, South, East and West.