Angkor Thom (Walled City)

This sprawling 12th-century walled city once served as the capital of the Khmer Empire and remains one of Southeast Asia's most awe-inspiring archaeological treasures. Encircled by a 12-kilometer stone wall and moat, Angkor Thom encompasses the famous Bayon temple with its haunting four-faced towers, plus countless lesser-known sanctuaries, palaces, and administrative buildings that whisper stories of ancient grandeur. Walking through its tree-lined avenues and crumbling stone structures feels like stepping directly into a lost civilization.