I90 through Minnesota, points of interest?
We'll be travelling through Minnesota this summer on our way to the Badlands. Our children are 13, 11 and 7. We like to get out of the truck and do something/see something in each state that we are tr...
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Niagara cave looks interesting to me, though somewhat out of the way from I-90 (Harmony, MN, just north of the Iowa border). I haven't been there myself, but I think 7, 11, or 13 year old me would have thoroughly enjoyed it--and probably present day me would too.
