The Khmer were great builders, filling the landscape with monumental temples, huge reservoirs (called baray) and canals, and laying an extensive road network with all sorts of bridges -the main highways are 800 km long. The most stunning temple, Angkor Wat, is a microcosm of the Hindu universe and defies imagination as the world’s largest religious complex - covering 200 hectares; nowadays it is crowded with tourists amazed with ruins that until recently were covered by the jungle. Its construction took some 30 years and was started by one of the greatest kings, Suryavarman II, around 1122 CE.