Platteville limestone is a distinctive building stone of southeastern Minnesota and southwestern Wisconsin characterized by its gray color, rough texture, and many fossils. It was heavily used in the early decades of the building of the Twin Cities and Faribault.

In the years leading up to and immediately following World War I, African Americans in St. Paul, Minneapolis, and Duluth established separate chapters of the recently formed National Association for the Advancement of Colored People (NAACP).

The Interstate State Park, located on 295 acres in Taylors Falls, is the second-oldest state park in Minnesota. Created in 1895, its unique topography and geological history draw many visitors to the area. It is the first park in the United States to be located in two states, Minnesota and Wisconsin, with the St. Croix River serving as the border. The two parks are operated separately by the states’ Departments of Natural Resources.

At the close of World War I, the Veterans of Foreign Wars (VFW) was the only centralized veterans’ organization prepared to help returning soldiers re-enter civilian life and to assist the families of the deceased. The American Legion formed soon after the war in order to serve veterans returning from Europe. Minnesota’s department of the Legion answered the call, creating programs that assisted veterans and led the way for the organization.

The six burial mounds at St. Paul’s Indian Mounds Park are among the oldest human-made structures in Minnesota. Along with mounds in Crow Wing, Itasca, and Beltrami Counties, they are some of the northernmost burial mounds on the Mississippi River. They represent the only ancient Native American burial mounds still extant inside a major US city.