Tianmen Mountain is a mountain located within Tianmen Mountain National Park, Zhangjiajie, in the northwestern part of Hunan Province, China. A cablecar was constructed in 2005 by the French company Poma from nearby Zhangjiajie railway station to the top of the mountain. Tianmen Mountain Cableway is claimed in tourist publications as the "longest …Tianmen Mountain is a mountain located within Tianmen Mountain National Park, Zhangjiajie, in the northwestern part of Hunan Province, China. A cablecar was constructed in 2005 by the French company Poma from nearby Zhangjiajie railway station to the top of the mountain. Tianmen Mountain Cableway is claimed in tourist publications as the "longest passenger cableway of high mountains in the world", with 98 cars and a total length of 7,455 m and ascent of 1,279 m. The highest gradient is 37 degrees. Tourists can walk on kilometres of paths built along the cliff face at the top of the mountain, including sections with glass floors. An 11 km road - Tongtian Avenue - with 99 bends also reaches the top of the mountain and takes visitors to Tianmen cave natural arch in the mountain of a height of 131.5 m. As with the mountain, the cave translates as Heaven's Door/天门 and has a 999 step entrance known as "the Stairway to Heaven."