Nature’s underground wonders have captivated explorers and curious travelers across the country for centuries. From ...

When the summer sun is blazing, there’s no better way to cool off than by heading underground. Caves offer a naturally air-conditioned escape, along with a chance to explore some of the Earth’s most ...

On Sunday’s episode of The Excerpt podcast: Hidden beneath Earth’s surface are caverns and pathways that hold the secrets of our planet’s very beginnings. Even after decades of exploration, there are ...

I drive north on Arkansas Highway 43 into the heart of the Ozarks. Thick frost blankets leafless trees on the ridges. They sparkle in the morning sun. The temperature rises to 16 degrees. I stop my ...

There is one very real subterranean attraction underneath State Street, though: a salt cave, said to be the largest of its kind in North America. Santa Barbara’s salt cave is not a natural phenomenon.