bakong temple in roluos

bakong temple roluos sandstone cambodia ancient angkor archaeology architecture asia buddhism building exterior built structure cambodian culture cultures east famous place history horizontal indochina khmer monument national landmark old outdoors religion southeast spirituality tourism travel destinations tropical climate unesco world heritage site wat hariharalaya mountain constructed rulers empire modern siem reap cambodia final decades 9th century served official state king indravarman city located area today called