Bluff seen from the north branch of the Root River in Olmsted County Park, south of Simpson, Minnesota. Photograph by Wikimedia Commons user Jonathunder, 2017. GNU free documentation license.
Thin layers of Platteville limestone on top of a St. Peter sandstone base inside Minnehaha Park in Minneapolis. Photo by William Wesen, September 26, 2006. Public domain.
Charles A. Lindbergh "Jenny" exhibit, Northwestern National Bank, Minneapolis, 1982. The iconic plane survived the Thanksgiving fire that destroyed the building in November of that year.