![Hicks Dome is a dormant cryptovolcano that sits in Hardin County in southern Illinois.](/images/uploads/_small/Hicks-Dome.jpg)
Best of: Scientists research dormant volcano in southern Illinois
At ground level, Hicks Dome looks like one of the many other bluffs in southern Illinois, but under the surface, it's a dormant volcano with unusual minerals and elements. The 21st was joined by a geologist that's been studying the dome.