A person could lose a lot of hours looking at maps from 100 years ago if they made the mistake of typing "Superior National Forest" in that search box above the booklet and then selected "Cartographic" from the list of media types.
They might, for example, spend a long time staring at this 1936
Sportsman's and Tourists' Map of Cook County in the Minnesota Arrowhead Country.
Or this
1924 map, annotated with the path of a snowshoe trip from Fall lake to Lutsen.
Or maybe a 1927
Map of Additions to the Superior National Forest, where one can try and figure out where all those ghosts of past logging came from, the ones they saw last summer while out in the middle of nowhere.
Probably best not to do this. I wouldn't have enjoyed it at all, had I accidentally done it myself, which I most certainly didn't.