The ruins of the site have provided evidence that Preah Khan functioned as a city, temple and Buddhist university. It was a significant community with almost 100,000 officials and servants and appeared to be quite wealthy. There is a moat surrounding the compound and each causeway features devas and asuras carrying a naga (similar to what we saw at Angkor Thom). Historians believe that this is an indication that Preah Khan was more significant to the King than Ta Prohm and the other temples that did not have this feature.
Similar to Ta Prohm, Preah Khan has been left largely un-restored, with numerous trees and other vegetation growing among the ruins.
The tree in the photo below died but its roots were left embedded in the temple.