Many places around the world use defunct salt mines for storage. We posted about one in Kansas some years ago. In the UK, there’s a salt mine storage facility that’s being filled up as the mine continues! See, this mine is so big that underground chambers are emptied and used to store not only historical records, but actual historical items that may one day be displayed in a museum, while mining is still going on somewhat down the line, so to speak. The salt itself makes up the walls of the facility, and also causes it to have much lower humidity than above-ground storage or other kinds of underground holes, which is crucial for preserving precious materials. Tom Scott, who can talk his way into any place, takes us on a tour of this underground storage facility and finds out what they’ll tell us and what they won’t about the treasures stored there for posterity.
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Source: neatorama