30°20′11″N 108°58′58″E/30.33639°N 108.98278°E/ 30.33639; 108.98278

Tenglong Cave (Chinese:腾龙洞;lit.'soaring dragon cave') is a cave located 6.8km (4.2mi) from Lichuan City, Hubei, China. It is believed to be the longest monomer karst cave system in the world. The cave entrance is 74m (243ft) and 64m (210ft) wide, leading to 59.8km (37.2mi) of passageways. An underground network of streams runs for 16.8km (10.4mi) whilst the cave is the source of the Qingjiang River. Year round temperatures underground remain in the 16–18 degrees Celsius range.

To facilitate tourist access to the cave, as well as to the so-called Enshi Grand Canyon Scenic Area (恩施大峡谷景区), the prefectural authorities are considering plans for the construction of a tourist railway, which will link these two popular tourist attractions with a station on the Yichang−Wanzhou Railway (probably, Lichuan).

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