Zhangjiajie, a city in the northwest of China's Hunan province, is home to the famed Wulingyuan Scenic Area. This protected zone encompasses thousands of jagged quartzite sandstone columns, many of which rise over 200m, as well as caves filled with stalactites and stalagmites. Wulingyuan also encompasses forests, rivers, waterfalls, and two large natural land bridges, as well as endangered plant and animal species. Wulingyuan includes Zhangjiajie National Forest Park, Suoxi Valley Nature Reserve, and Tianzi Mountain Reserve. Each park offers cable cars, hiking trails, and rivers for rafting. Zhangjiajie National Forest Park is home to scenic Golden Whip Stream. The park’s Yuanjiajie area contains the naturally formed Tianqiashengkong more than 350m above the valley, and the glass-and-steel Bailong Elevator, which ascends roughly 330m straight up a cliffside. Tianmen Mountain features a natural archway with 999 carved steps leading to its entrance. The cliff-hanging walkway and glass skywalk are hundreds of meters high.