Archive for July 15th, 2009
July 15, 2009 – Touring Tower Soudan Underground Mine
When it rains, it’s time to do some touristy indoor things, or in this case, underground tours. The Tower-Soudan underground mine is now a state park and you go down the original mineshaft about a half-mile underground.
Here Martin plays with a toy model of the elevator shafts that show how the two shafts counterbalance each ...Read more.
