Lava Tubes and Millions of Artifacts | Caving in the National Parks
America and its national parks system are full of underground wonders, from South Dakota’s Wind Cave to the largest cave system in the world at Mammoth Cave National Park. However, although Wind and Mammoth Caves are official National Parks, not every cave in the system has that coveted title. Today, we're looking at some hidden gems of America’s underground. Let’s take a look at Russell Cave National Monument, Jewel Cave National Monument, and the Lava Tube Caves of El Malpais National Monument.
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