Angkor Wat: The World’s Largest Religious Masterpiece After 18 years of guiding travelers through these ancient corridors, I’m still floored by the scale of Angkor Wat. Spanning over 162 hectares, it’s not just a temple—it is the world’s largest religious monument, designed as a physical map of the Hindu universe. To build this "Stone Mountain," ancient Khmer engineers moved millions of sandstone blocks from 40km away using a complex canal system.