Superfluous City: Metropolitan Mining »

superfluouscity:

“Some 1,200 feet beneath the streets of Detroit, under the north end of Allen Park, Dearborn’s Rouge complex and most of Melvindale, runs 100 miles of subterranean roads over an area of more than 1,500 acres. It is the Detroit Salt Mine and as a Detroit industry it is older then automobiles. As a…

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    holy shit, never knew about this. awesome!
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