Save
You must be signed in to save park lists.
Your Park Lists
add New List
Add Photo
You must be signed in to add photos.
state route ranger badge
Illinois
66

Illinois State Parks

responsive menu icon
USA Parks
Illinois
Southwestern Region
Illinois Caverns
Illinois Caverns © Afrierd2 at English Wikipedia / Public domain, via Wikimedia Commons
Drapery and flowstone in Chimney Dome Figure provided by A. Frierdich
Cardinal © stateparks.com
Cardinal
Search
Availability
Calendars
Availability Search
ILLINOIS CAVERNS
ILLINOIS CAVERNS
4369 G Road
Waterloo, Illinois   62298
(lat:38.2366 lon:-90.1369) map location

Phone: 618-458-6268
Email: park email button icon
Illinois Caverns will be open seasonally from April 15th through October 31st. Weekly, the site will be open Thursday through Sunday from 8 AM to 4 PM with the cave itself being open from 9-3.

There is no admission charge, but guests are required to complete an application permit at the site office before entering the cave. Visitors are required to be in groups of four or more, have sturdy boots, a hard hat and three sources of light per person.

Illinois Caverns State Natural Area is a 120-acre preserve owned by the Illinois Department of Natural Resources. The main attraction of the site is an uninmproved wild cave with nearly three miles of walking-height passage. Located in karst-rich Monroe County, the area contains fields, woodlands, native grasses and a half-mile long prairie trail.
Nature of the Area
Illinois Caverns contains an extensive array of spectacular cave formations, including stalactites, stalagmites, rimstones dams, flowstone, and soda straws. Many of the formations are actively growing with the continued deposition of calcium carbonate. An underground stream meanders through the cave in its enriched bed. Throughout the year, the temperature in the cave remains a relatively constant 58 degrees Fahrenheit. Approximately 6 miles of the cavern's passages have been mapped by a caving group from Chicago, the windy City Grotto.
History of the Area
Over millenniums of time, the dissolving action of water along the subterranean cracks formed large, water-filled conduits or underground streams. Meanwhile, erosion on the surface began to cut valleys into the surrounding countryside. As the surface valleys deepened, some of the underground passages were drained, creating the air-filled passages known as caves.

During the cave-making process, water acts not only as a dissolver, but also as a builder. In the protected cave environment, dripping and seeping water can deposit carbonate materials and from a host of geological formations.




Visitor Comments, Memories and Reviews
write a review
Share On

Nearby Hotels
Booking.com

state route ranger badge
Illinois
66

Illinois State Parks

X