What mysteries await below our feet? Discover for yourself by visiting one of these marvelous cave or cavern adventures.

From crystal-clear waters to amazing rock formations, cave swimming is an adventure that is both thrilling and peaceful. Here ...

The Waitomo Glowworm Caves in New Zealand offer a unique experience, with glowworms illuminating the ceilings like a starlit ...

I spent an afternoon going deep underground at Glenwood Caverns in Glenwood Springs, Colorado. Here's why everyone should ...

Carved into the rock beneath a Swedish city, a huge man-made cave system dating back to the Cold War is being used to heat ...

Carlsbad Caverns National Park will be adjusting their hours later this month, and keeping ranger-led tours closed for the ...

Kartchner Caverns State Park is known for its diversity of minerals. On March 1, park staff spotted one that's particularly ...