sixpenceee: Er Wang Dong is a large cave in Wulong County in South-Central China. It has a length of 42,139 meters with a maximum depth of 441 m. It is large enough to contain its own weather system.

sixpenceee: Er Wang Dong is a large cave in Wulong County in South-Central China. It has a length of 42,139 meters with a maximum depth of 441 m. It is large enough to contain its own weather system.

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from: https://itbeginswithahouse.tumblr.com/post/107428059482