Lincoln-Douglas Debate Square is a historic site located in Alton, Illinois. It commemorates the famous debates between Abraham Lincoln and Stephen A. Douglas in 1858, which focused on issues like slavery and states' rights. The square features plaques and markers that provide information about the debates and their significance in American history. The square serves as a gathering place for community events and educational activities. It highlights the importance of civil discourse and public debate in a democratic society. Visitors can learn about the legacy of Lincoln and Douglas while enjoying the park-like setting.