Six Illinois historic sites are operating seven days a week for the convenience of tourists traveling in the spring and summer.
Cahokia Mounds in Collinsville will be open seven days a week through October. Lewis and Clark in Hartford, the Lincoln-Herndon Law Office in Springfield and the Old State Capitol in Springfield will be open seven days a week through Labor Day.
Lincoln Tomb and War Memorials in Springfield and Lincoln's New Salem near Petersburg will be open seven days a week through September.
All historic sites and monuments run by the Illinois Historic Preservation Agency are free for visitors. However, they all accept donations.