Point of Interest
$18Bluespring Caverns Park
Longest underground river boat tours in America
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Point of Interest
$7Spring Mill State Park Pioneer Village
Working 1800s mill village with cave tours
Point of Interest
$18Marengo Cave National Landmark
Historic limestone cave tours in karst country
Point of Interest
$7Cahokia Mounds State Historic Site Museum
Ancient city museum at America's largest prehistoric mound
Point of Interest
FreeHennepin Canal Parkway State Park Visitor Center
Historic 104-mile canal system with restored locks
Point of Interest
Apple River Canyon State Park Illinois River Confluence
Illinois' deepest canyon with fossil-rich walls
Point of Interest
Buffalo Rock State Park Illinois River Overlook
River valley views from a sandstone cliff
Point of Interest
FreeCahokia Mounds State Historic Site
Ancient city ruins bigger than medieval London
Point of Interest
FreeCache River State Natural Area
Ancient cypress swamps in the Illinois heartland
Point of Interest
FreeGarden of the Gods Recreation Area
Iconic sandstone formations in southern Illinois.