A 'Khmer' building featuring polygonal masonary. Famous for its solar alignment where on certain days of the year near to the Spring and Autumnal equinoxes the sun is seen rising or setting through the 15 doorways of the roughly west/east aligned building. The stones are tight fitting with no mortar or cement. The stones also often feature small round holes. Also evidence of what maybe geopolymer castings for some sculptures and some walls. The internal joints appear polished. Also a possible 'softened stone'. Nearby to the site is a large rectangular reservoir similar to those of Angkor Wat, Cambodia.