Angkor Thom was the last capital of the Khmer Empire, built by King Jayavarman VII in the late 12th century. The walled city spans 9 square kilometers and contains remarkable temples, most notably the Bayon with its massive stone faces. Five monumental gates adorned with Buddhist faces lead into the city, flanked by statues of gods and demons. The site represents the pinnacle of Khmer architecture and urban planning in Southeast Asia, showcasing the empire's power and spiritual devotion.