Zhangjiajie National Forest Park is truly breathtaking. The sandstone pillars rising out of the mist look unreal, and it is easy to see why the landscape inspired the scenery of Avatar. Yuanjiajie and Tianzi Mountain offer the most spectacular viewpoints, and the Bailong Elevator is an experience in itself. The free shuttle buses inside the park are efficient and make it easy to move between areas. It can get crowded at the main spots, so I recommend arriving early in the morning. Plan at least a full day, ideally two, and bring good walking shoes. An unforgettable place, absolutely worth the trip.