| Yilong Cave | |
| Location: | Pingxiang City, Jiangxi Province, People's Republic of China |
| Length: | 4200m (13,800feet) |
Yilong Cave is a 180-million-year-old karst cave located in Pingxiang City, Jiangxi Province, People's Republic of China.[1] Also known as Nielong Cave (孽龙洞/孽龍洞 literally evil dragon cave), the cave extends to around 4200m (13,800feet) in length. Inside there are unusual rock formations, small streams and waterfalls.