Lidtke Mill is a historic site on the Upper Iowa River located in the "Old Town" area of Lime Springs, Iowa. It is part of the 10-acre Lidtke Park. At one time, it not only milled grains but also provided hydroelectric power to surrounding communities. The footprints of a worker nearly electrocuted there can still be seen in the floor of the control room. The mill is now open as a museum. From time to time, events such as the Buckwheat Festival are held at site.