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An Underground Chamber Has Been Discovered Beneath The National Mall In Washington, D.C.
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allthatsinteresting.com

An Underground Chamber Has Been Discovered Beneath The National Mall In Washington, D.C.

Found just below Smithsonian Castle, the chamber appears to be a 19th-century cistern meant to collect rainwater that had been forgotten for more than a century. The post An Underground Chamber Has Been Discovered Beneath The National Mall In Washington, D.C. appeared first on All That's Interesting.
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