The Angkor monuments in Siem Reap, Cambodia, are known as the Great Wall of China, the pyramids of Egypt, and the Borobudur of Indonesia. In 1992, UNESCO listed the entire Angkor monument as a world cultural heritage, the Angkor Archaeological Park. The essence of Angkor Archaeological Park is the big and small Angkor, located6.4 kilometers north of Siem Reap. The big Angkor is also known as Angkor Thom, and the small Angkor Wat is also known as Angkor Wat.