Hariharalaya
Cambodia
Hariharalaya (Hariharalaya) was an ancient city and capital of the Khmer empire located near Siem Reap, Cambodia in an area now called Roluos. Today, all that remains of the city are the ruins of several royal temples: Preah Ko, the Bakong, Lolei.
Archaeological site data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).