Cavern

The largest caverns in the eastern United States. Guided tours along lighted, paved walkways lead visitors through cathedral-sized rooms, towering stone formations, and natural wonders at every turn.

These unusual places have the Wow! factor by the bucket load.

Emerald Cave, Black Canyon, Arizona • Khao Luang Caves, Phetchaburi, Thailand • Gyokusendo Cave, Okinawa, Japan • Alabaster Caverns State Park, Oklahoma, USA • Mendenhall Ice Caves, Juneau, Alaska, USA • More ...

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Did you know there were caves in Florida? Cave diving is popular at many of the Florida springs, but Florida Caverns State Park is the only dry cave open to the public. Behind a heavy metal door awaits exploration into another world. How did these caves form? Millions of years ago, sea levels were much higher leaving a majority of the coastal areas underwater. Over the years, as sea levels fell, debris on the sea floor hardened into limestone which was dissolved by naturally acidic…

Mount St. Helens, Wa Unedited 35mm

A year-long adventure to all 59 of the U.S. National Parks during 52 weeks to celebrate the NPS centennial in 2016. #59in52

In Calaveras County, California, there's one magical place that you can't even imagine is real until you see it. Check out the Natural Bridge Cavern.

Sun shining into the entrance to the Khao Luang Cave temple, Phetchaburi, Thailand.