The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

A tunnel with windows, so you don't miss out on the impressive views.

The unusual patterns in this rock formation result from two distinct modes of weathering.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

Most-visited and most-photographed slot canyon in the American Southwest.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The notorious Wild West outlaw was raised in this unassuming abode.

Once a mortuary that held the remains of Buffalo Bill, this Denver hotspot is now a death-fixated restaurant.

A Rocky Mountain city provides a happy ending for a pinto pony and his Brobdingnagian red chair.

A saloon and inn that served the Wild West's most iconic figures—and is still haunted by some of them today.

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

A natural formation that resembles a camel resting in the New Mexico desert.

This building is a recreation of the gatehouse that separated Los Alamos from the outside world during the era of the Manhattan Project.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

Once a dining hall for boarding school students, this lodge was a popular haunt for nuclear physicists working on the Manhattan Project.

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

This opulent Pueblo Deco movie palace melds Art Deco and Native American motifs.

The beloved, war-tested mascot of a Union regiment graces their battlefield monument.

The country's oldest continually-operated mini golf course lies hidden in plain sight, eclipsed by one of D.C.'s most popular tourist attractions.

A bas relief commemorates the "Nuns of the Battlefield" who cared for soldiers on both sides of the conflict.

This rowhouse doubles as one of the most photographed spots in the nation's capital.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

The only structure left with direct ties to the Salem witchcraft trials of 1692.