The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.

Charleston's historic city jail once held everyone from pirates to Civil War POWs.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

One of the oldest living oak trees in the Southeast.

This small-town pizzeria won the Hollywood lottery.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

The land is home to swimming ponies and a legendary 18th-century treasure.

Home to the deepest rift anywhere on Earth.

Dedicated to the history of the 1,000 nuclear missiles that once covered the Great Plains.

The granddaddy of all tourist traps, built on ice water, jackalopes, and a giant dinosaur.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

This was once the home of Gahan's Saloon, Denver's most storied speakeasy.

The spot in the Mile-High City that's exactly 5,280 feet above sea level (at least for now).

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

This volcano rises like a giant anthill from the plains below, with a road spiraling up to the rim.

"I did this all while you were watching TV."

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A homage to the King at the hotel where he revived his career.

Las Vegas's very own 40-foot-tall fire-spewing praying mantis.

Experience a charming 1930's version of "infotainment."