At the height of the Khmer era Nakhon Ratchasima was an important route into the Khmer kingdom. This fact is reflected by Phimai Historical Park. Parts of the park are actually older than Angkor Wat in Cambodia. It features a huge Angkor white sandstone shrine (around 30 meters tall) which is surrounded by smaller pink-colored shrines.
The park also houses Thailand's largest number of Khmer buildings. Four gateways are visible in the compound and there are a number of sculptures leading to the shrine. The site is currently being restored to its former glory, but as it stands it is still very impressive - aside from Angkor Wat, Phimai Historical Park offers some of the best examples of Khmer architecture. The park also has a modern museum with a small gift shop and restaurant where some of its more precious artifacts are shown.