Angkor Archaeological Park, near Siem Reap in northern Cambodia, is one of the most important archaeological sites in Southeast Asia. Stretching over 400 km², including forested area, Angkor Archaeological Park contains the magnificent remains of several capitals of the Khmer Empire of the 9th to the 15th centuries, including the largest pre-industrial city in the world. The most famous are the Temple of Angkor Wat and, at Angkor Thom, the Bayon Temple with its countless sculptural decorations. Angkor Archaeological Park was declared a UNESCO World Heritage site in 1992. At the same time, it was also placed on the List of World Heritage in Danger due to looting, a declining water table, and unsustainable tourism. UNESCO has now set up a wide-ranging programme to safeguard this symbolic site and its surroundings. Angkor has no accommodations and few facilities; the nearby town of Siem Reap, 6 km south, is the tourist hub for the area. You will likely be refused entry to certain sites, such as the highest tier of Angkor Wat, if you are deemed not to be dressed appropriately. This means your shoulders and knees should be covered - a scarf over your shoulders may not be accepted. - Wikivoyage - Image by @ploykbalthom