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Did you know there is a huge salt mine under the city of Detroit? Detroit is located at the western end of Lake Erie. Can you find Lake Erie, little Sage? No? Well, it's not on the map of Cornwall, dear. Let me show you. :) [click to enlarge map]

There is too! Don't be shaking your head, little Sheila!
• The mine has been operating over 100 years
• It covers 1500 acres
• There are over 100 miles of "roads" down there
• The mine shaft opening is at 12841 Sanders Street
• No more tours currently
• Provides winter rock salt for the roads in Michigan (and other places)
• Salt deposited millions of years ago
It is truly a city beneath a city, 1,100 feet down, though many Detroiters aren't aware it is down there. But now YOU know!

Credit where credit is due. This post was inspired by a post (partly about salt) from the eminently more interesting blog of the Travelling Spouse.