Angkor Thom – UNESCO World Heritage Site and one of the Seven Wonders of the World - is magnificent inner royal city built by the end of the 12th century by king Jayavarman VII. It covers an area of 9 km² and is renowned for its temple grounds, towering southern gate and Bayon.
Angkor Thom (literally: "Great City"), was the last and most enduring capital city of the Khmer empire. At the centre of the city is Jayavarman's state temple, the Bayon, richly decorated temple with its most distinctive feature of serene and massive stone faces on the many towers.
The city lies on the right bank of the Siem Reap River, quarter of a mile from the river. The south gate of Angkor Thom is 7.2 km north of Siem Reap, and 1.7 km north of the entrance to Angkor Wat. The walls, 8 m high and flanked by a moat, are each 3 km long, enclosing an area of 9 km². A causeway spans the moat in front of each tower: these have a row of devas on the left and asuras on the right, each row holding a naga (King snake) in the attitude of a tug-of-war. The south gate is now the most often visited, as it is the main entrance to the city for tourists. Most of the great Angkor ruins have vast displays of bas-relief depicting the various gods, goddesses, and other-worldly beings from the mythological stories and epic poems of ancient Hinduism (modified by centuries of Buddhism). Mingled with these images are actual known animals, like elephants, snakes, fish, and monkeys, in addition to dragon-like creatures that look like the stylized, elongated serpents (with feet and claws) found in Chinese art.
There are several other monuments within Angkor Thom such as: Baphoun, Phimeanakas, Preah Palilay, Elephant and Leper King Terrace.