Just re-visited an old mine located on a side road of the Gunflint Trail alongside of a portage between two lakes. The mine shaft is about twenty feet deep. The mine was dug some time between the 1870-80s in a futile search for silver or gold. Neither to my knowledge was ever found.
Sorry not a good quality image
The last time I was there was on a July 4th weekend about fifty years ago and at that time there was still snow at the bottom of the pit. This time there was not any snow but at the bottom was a skeleton of moose. The poor animal must have fallen in and with no way to get out expired there.