An Illinois State Historical marker and interpretive sign describe assistance to freedom seekers at the site of the former Jan and Aagie Ton farm near the Little Calumet River at the south edge of Chicago. (National Park Service photo) Community, History, Local, Organizations Program to Celebrate Proposed Chicago-to-Detroit Underground Railroad Trail by eNews Park Forest on February 9, 2025 eNews Park Forest Author More in Community: Save the date for The Prairie Party at theNate June 17, 2026 Blackhawk Tower Plaza Demolition Begins June 9, 2026 Park Forest Housing Cooperative to Honor Former Residents Philip Klutznick and Jim Edgar June 9, 2026 Discover the Historic Underground Railroad Trail in South Holland with Music, Dance, Storytelling