Wyoming is full of special places. If you've been here or live here, you know this already. One of those places is a secret underground geothermal cave and you shared pics and video to prove it is real.

Huge thanks to Shannan Morris and Zach Heidrich who messaged us when we first shared the story of Wyoming's Geothermal Underground Cave. We kept the location secret and only disclosed it on a case-by-case basis to those who promised they would respect the area and not do anything to modify or harm it. Shannan and Zach were one of those few. They followed through on their promise to visit and protect and just shared their own amazing photos and videos.

Wyoming's Underground Geothermal Cave is Real and You Proved It

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Shannan and Zach also captured some video. Make sure your sound is turned up to hear that water.

Thanks again to Shannan and Zach and all that cherish these special natural parts of Wyoming and fight to preserve them for future generations. We appreciate you.

LOOK: Stunning vintage photos capture the beauty of America's national parks

Today these parks are located throughout the country in 25 states and the U.S. Virgin Islands. The land encompassing them was either purchased or donated, though much of it had been inhabited by native people for thousands of years before the founding of the United States. These areas are protected and revered as educational resources about the natural world, and as spaces for exploration.

Keep scrolling for 50 vintage photos that show the beauty of America's national parks.

RANKED: Here are the most popular national parks

To determine the most popular national parks in the United States, Stacker compiled data from the National Park Service on the number of recreational visits each site had in 2020. Keep reading to discover the 50 most popular national parks in the United States, in reverse order from #50 to #1. And be sure to check with individuals parks before you visit to find out about ongoing, pandemic-related safety precautions at www.nps.gov/coronavirus.

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