Zhangjiajie - a city in the northwest of China's Hunan province, is home to the famed Wulingyuan Scenic Area, which was designated a UNESCO World Heritage Site in 1992 as well as an AAAAA scenic area by the China National Tourism Administration. Wulingyuan Scenic Area is comprised several national parks, the most famous of which is Zhangjiajie National Forest Park, a 243 square mile park is full of stunning karst pillars of sandstone, covered with sub-tropical rainforest. The park is often covered in fog, adding to the mystery but obscuring views.