Miners Castle by Charles Bonham
I always wondered about the whole “miner” thing with Miners River/Falls/Castle in the Pictured Rocks National Lakeshore. The Miners Falls Trail Guide explains that:
Visited by passing English geologists in 1771-1772, the nearby Miners River was named by employees of Alexander Henry during one of his exploratory trips on Lake Superior. At that time, indicators or “leaders” were used to locate mineral deposits. Discolored water oozing from bedrock was one such leader found in the Miners Basin, although no minerals were ever extracted from this area.
Charles took took this pic last week. See lots more on his Flickr!

