The Imperial Summer Mountain Resort (Bishushanzhuang) and its Outlying Temples is located in Hebei, 3 hours' drive from Beijing. The size of Chengde Summer resort is as big as the Forbidden City and the Summer Palace combined. It is surrounded by a 10 kilometres long wall and covers 590 hectares. It also absorbs the style, arts and culture of many other cultural groups, especially the Tibetans. "Mountain Resort and its Outlying Temples, Chengde" was added to UNESCO's World Heritage List in 1994.