An uphill trek leads to one of the most fascinating quarries in the Northeast. But it's not for the faint of heart.

Deep in Central Oregon lies a short yet unnervingly narrow lava‑tube hike full of basalt corridors and tight passages where ...

Alabama has thousands of caves, and likely hundreds more that have yet to be discovered. The highest concentration of these caves can be found in Jackson County, which has more caves per square mile ...

Excitement filled the room as nervous eyes scanned informational displays and artifacts that decorated a staging area. Soon, our group of about 10 would descend deep into the caverns of the Cave of ...

Excitement filled the room as nervous eyes scanned informational displays and artifacts that decorated a staging area. Soon, our group of about 10 would descend deep into the caverns of the Cave of ...

They might be surprised to learn that one of Iowa's most picturesque and claustrophobic hikes is found underground at ...

This densely forested trail in Michigan leads to a cave. It's not a great hike for those who dislike confined spaces.

While corn fields might be all that comes to mind when picturing Ohio's geography, there are several beautiful regions of the ...