Bakong
Bakong is the largest and most interesting of the Roluos Group temples, and has an active Buddhist monastery just to the north of the east entrance. It was built and dedicated to Shiva by Indravarman I. It's a representation of Mt Meru, and it served as the city's central temple. The east-facing complex consists of a five-tier central pyramid of sandstone, 60m square at the base, flanked by eight towers (or their remains) of brick and sandstone and by other minor sanctuaries.