Zhangjiajie

Declared in 1982, it was China's first national forest park. Its more than 3,000 quartzite sandstone pillars, carved over millions of years by water and ice, were the direct and acknowledged inspiration for the floating mountains of Pandora in James Cameron's Avatar (2009) — to the point that one of its most emblematic pillars was officially renamed Avatar Hallelujah Mountain after the film came out. It has been a UNESCO World Heritage Site since 1992 within the Wulingyuan area, and its glass bridge, the longest and highest in the world with a transparent floor over a drop of more than 300 metres, has become one of its greatest draws.