Wulingyuan (Chinese: 武陵源; pinyin: Wǔlíng Yuán) is a scenic and historic interest area in Hunan Province, China, noted for its approximately 3,100 tall quartzite sandstone pillars, some of which are over 800 metres (2,600 ft) in height and are a type of karst formation. The site is in the Zhangjiajie City and lies about 270 kilometres (170 mi) from Changsha, the capital of Hunan Province. Situated between 29°16′0″N 110°22′0″E / 29.266667°N 110.366667°E / 29.266667; 110.366667 and 29°24′0″N 110°41′0″E / 29.4°N 110.683333°E / 29.4; 110.683333, it was designated a UNESCO World Heritage Site in 1992. Wulingyuan forms part of the Wuling Range. The scenic area comprises of several national parks, one of which is the Zhangjiajie National Forest Park.