Kbal Spean (Khmer: ក្បាលស្ពាន, Khmer: [kɓaːl spiən]; ) is an Angkorian-era archaeological site on the southwest slopes of the Kulen Hills to the northeast of Angkor in Banteay Srei District, Siem Reap Province, Cambodia. It is situated along a 150m stretch of the Stung Kbal Spean River, from the main Angkor group of monuments, which lie downstream. The site consists of a series of stone rock relief carvings in sandstone formations of the river bed and banks. It is commonly known as the "Valley…