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| Lighthouse |
| Metro and City Park |
| National Forest |
| National Historic Landmark |
| National Historic Site |
| National Historical Park |
| National Memorial |
| National Park |
| National Recreation Area |
| National Seashore |
| National Wildlife Area |
| National Wildlife Refuge |
| State Fish Hatchery |
| State Fishery Area |
| State Forest |
| State Historic Site |
| State Memorial |
| State Natural Area |
| State Nature Preserve |
| State Nursery |
| State Park |
| State Preserve |
| State Recreation Area |
| State Reserve |
| State Wildlife Area |
| State Wildlife Management Area |
| State Wildlife Refuge |
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| Ayers Sand Prairie State Nature Preserve | State Nature Preserve | 6.7 | Savanna | Illinois |
| Dalton Pond State Fishing Access Area | State Park | 13.3 | Preston | Iowa |
| Bellevue State Park | State Park | 15.6 | Bellevue | Iowa |
| Apple River Canyon State Park | State Park | 21.5 | Apple River | Illinois |
| Morrison Rockwood State Park | State Park | 22.8 | Morrison | Illinois |
| Lake Le Aqua Na State Park | State Park | 25.8 | Lena | Illinois |
| Princeton Wildlife Mgmt Area | State Wildlife Management Area | 31.1 | Princeton | Iowa |
| Maquoketa Caves State Park | State Park | 32 | Maquoketa | Iowa |
| Mines of Spain State Park | State Park | 32.4 | Dubuque | Iowa |
| Barber Creek Wildlife Mgmt Area | State Wildlife Management Area | 35 | Grand Mound | Iowa |