Four days a year, the Minnesota Historical Society will provide FREE admission to its historic sites and museums! On June 28, take this opportunity to learn more about our state's history, at no cost to you. The historic sites and museums that usually have an admission fee but will be FREE on June 28 include: METRO James J. Hill House, St. Paul - Free Train Day Historic Fort Snelling, St. Paul - Hosting Big Red Wagon food truck Mill City Museum, Minneapolis - The Flour Tower elevator show will not be available. - See a flour dust explosion and learn the story behind the deadly - Washburn A Mill explosion of 1878. - Make-it, take-it activities Minnesota History Center, St. Paul Oliver Kelley Farm, Elk River GREATER MINNESOTA Charles Lindbergh House and Museum, Little Falls Comstock House, Moorhead Folsom House, Taylors Falls Forest History Center, Grand Rapids Historic Forestville, Preston - Guided tours will be first come-first-serve due to limited capacity. - Ticketed Natural Dye Demonstration - Ticketed Yoga in the Meadow Jeffers Petroglyphs, Comfrey - Free Author event Lower Sioux Agency, Morton Mille Lacs Indian Museum and Trading Post, Onamia - Ticketed Ojibwe Moccasin Workshop Sibley Historic Site, Mendota Snake River Fur Post, Pine City Split Rock Lighthouse, Two Harbors W.W. Mayo House, Le Sueur Please check the seasonal hours for each site at mnhs.org/visit .