This historic hotel on Bathhouse Row in Hot Springs National Park has a storied history of gangsters and baseball greats.

Watch the newest land on the planet form before your eyes.

The longest living non-clonal organisms on Earth.

The only road through the heart of Glacier National Park.

The king of U.S. high points towers over every other peak on the continent.

The highest dunes in California are the most likely place in the area to hear the Singing Sands.

An abandoned Jazz Age dream home and con man's hideout in Death Valley.

Windswept and remote, this island was once the home of a rare mammoth and today is home to a rare tree.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

See massive fossils that are over 200 million years old in northeastern Arizona.

A six-ton, 12-foot-tall concrete prairie dog is touted as the largest in the world.

An abandoned mine where dreams of quicksilver trickled away over 75 years ago.

This crumbling stump is all that remains of what was once thought to be the oldest living organism.

Steep canyon walls hide a forested oasis in the West Texas desert.

When this test site was abandoned, they didn't even bother to take the rocket with them.

This angular Dwarven tunnel cuts through a mountainside in Glacier National Park.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

One day a year it is legal to jump off of this astoundingly tall bridge that spans an Appalachian gorge.

A community of collapsing homes more than a mile out from the Florida coast.

A gothic palace of endless stalagmites and pseudoscorpions waits within one of the world's most beautiful caves.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

The northernmost truck stop in the United States.

The illuminated falls are a gem in North Cascades National Park.