Zhangjiajie trip May 13-15th May 21, 2016 May 21, 2016 Wanna Travel Admin Wanna Travel Blog avatar, glass bridge, grand canyon, hunan, shanghai, wannatravel, weekend trip, Zhangjiajie A trip to Zhangjiajie Grand Canyon and Avatar mountains The longest glass bridge in the world: A trip to Zhangjiajie Grand Canyon and Avatar mountains The longest glass bridge in the world: