The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

The site where a nuclear bomb was lowered over 8,000 feet underground and detonated as an experiment in natural gas extraction.

A river runs through this remote valley in a very unexpected way.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

Rather than a run-of-the-mill franchise hotel, this lodging has been decked out in dinosaur decor.

The fifth tallest statue in the United States is a shirtless monument to the oil worker.

One of the best examples of Art Deco architecture in the United States.

The collection is housed in an exquisite mansion that makes you feel like you've been transported to an Italian villa.

When you can afford only half a road, you build only half a road.

These massive mitts are made of 30 tons of devotional bronze.

Nature's biggest mammal swims in landlocked Oklahoma.

A whimsical monument marks the highest point in Kansas, not that you could tell by the looks of it.

This hot dog-shaped diner has moved all around Colorado, never been to New York.

A massive sea stack famous for its appearance in The Goonies.

Commonly referred to as the most photographed Victorian home in the United States.

This unlicensed collection of fast-food memorabilia sits on the site of the first ever McDonald's restaurant.

The Grand Canyon of Texas.

A tribute to Ponce de Leon's supposed quest for eternal youth.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

In the remote high desert of New Mexico, a strange array of poles beckon fury from above.

One of the ghostly stops along Route 66.

One of the oldest living oak trees in the Southeast.