Angkor Archaeological Park is a fascinating UNESCO World Heritage Site. These Khmer temple ruins were built from the 9th through the 12th centuries. This former “Temple City” is the pride of Cambodians and visited by over two million people a year. The park stretches about 150 square miles, making it the world’s largest religious complex. The core sections are Angkor Thom, Bayon Temple, Ta Prohm (Jungle Temple) and Angkor Wat shown here.