For Tianmen Mountain, Zhangjiajie is a fine location. For the rest of what you'd go to Zhangjiajie for (Golden Whip Stream nature hike; Yellow Dragon Caves; Baofeng Lake; and of course the Avatar-movie-type mountains, including "Hallelujah Mountain," stay in Wulingyuan. This is China, so don't expect Western standards to apply, but enjoy the adventure. There's a lot to do and see!
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