Illinois - Role: Structure
| Airtight Bridge |
| Alternate Route 66, Wilmington to Joliet |
| Armour's Warehouse |
| AVR 661 |
| Babylon Bend Bridge |
| Bernadotte Bridge |
| Blakeman Bridge |
| Bolivia Road Bridge |
| Bridge at Thirteenth Street |
| Brooks Catsup Bottle Water Tower |
| Buckeye Bridge |
| Buffalo Grove Lime Kiln |
| Camelback Bridge |
| Cemetery Road Bridge |
| Chain of Rocks Bridge |
| Chicago & North Western Railway Stone Arch Bridge |
| Douglas Tomb State Memorial |
| Duncan Mills Bridge |
| Dutch Mill |
| Elmwood Cemetery Gates |
| Embarras River Bridge |
| Fall Creek Stone Arch Bridge |
| Fifteenth Street and Oklahoma Avenue Brick Street |
| Fountain Creek Bridge |
| General Dean Suspension Bridge |
| Griggsville Landing Lime Kiln |
| Grosse Point Light Station |
| Havana Water Tower |
| Hawes, J. H., Elevator |
| Hazen Bridge |
| Highland Park Water Tower |
| Illinois and Michigan Canal |
| Illinois Central Railroad Water Tower and Pump House |
| Illinois Central Stone Arch Railroad Bridges |
| Illinois Iron Furnace |
| Illinois Route 4-North of Auburn |
| Indian Ford Bridge |
| Leaning Tower of Niles, The |
| Lena Water Tower |
| Lincoln Tomb |
| London Mills Bridge |
| Lyndon Bridge |
| Mary's River Covered Bridge |
| Memorial Bandstand of Long Point |
| Morris Wide Water Canal Boat Site |
| Music Pavilion |
| North Shore Sanitary District Tower |
| Old Stone Arch Bridge |
| Old Stone Arch, National Road |
| Old Stone Gate of Chicago Union Stockyards |
| Oquawka Wagon Bridge |
| Peotone Mill |
| Potter and Barker Grain Elevator |
| Ransom Water Tower |
| Red Covered Bridge |
| Riverside Park Bandshell |
| Route 66 by Carpenter Park |
| Route 66, Cayuga to Chenoa |
| Route 66, Girard to Nilwood |
| Route 66, Litchfield to Mount Olive |
| Route 66 South of Lake Springfield |
| Seville Bridge |
| Sixth, Seventh, and Tenth Street Stone Arch Bridges |
| Stone Arch Bridge |
| Stone Arch Bridge |
| Stone Quarry Bridge |
| Sugar Creek Covered Bridge |
| Tartar's Ferry Bridge |
| Third St. Bridge |
| Thompson Mill Covered Bridge |
| U-505 (IX C U-Boat) |
| Union Lookout |
| US Army Aircraft C-53-DO-41-20124 |
| US ARMY Aircraft P-51D-25NA 44-73287 |
| USS SILVERSIDES (SS 236) National Historic Landmark |
| Waltmire Bridge |
| Water Tower, Building 49 |
| West Water Tower and Ground Storage Tank |
| Wooden Alley |
Data from United States Park Service and Wikidata
