Alton Military Prison Site in Alton, Illinois, is a compelling Route 66-area attraction for travelers interested in Civil War history, heritage tourism, and unforgettable road trip stops along the Mother Road. Once one of the largest Union military prisons during the Civil War, the site connects visitors to a powerful chapter of American history in the heart of Alton. While little of the original prison remains, the location is recognized for its historic significance and offers a meaningful stop for history lovers exploring Alton and nearby route66 destinations. Add this landmark to your travel itinerary for a unique tourism experience that blends local history, cultural interest, and the charm of a classic Illinois road trip.
