Lidtke Mill is a historic site on the Upper Iowa River located in the "Old Town" area of Lime Springs, Iowa. 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.