This ratty natural history collection is a charming relic among a city rushing into modernity.

This innocuous New Mexico storefront was once the secret jump-off spot for Manhattan Project scientists.

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

A small horde of mythical creatures lurk almost imperceptibly within the museum's wildlife dioramas.

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

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

When ecosystems collide in the arid Southwest.

$10,000 won in a poker game in 1884 allowed James Draughon to build this intriguing home.

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

This stoic, if derpy, giant stands as a monument to Oregon's statehood and the novelty culture of yesteryear.

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

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

The highest paved road in North America winds its way up Mount Blue Sky in Colorado to an altitude of 14,130 feet above sea level.

This statue of an obscure comic strip hero stands as a tribute to patriotic service and a cautionary tale about embracing fads.

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

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

Unique tower has outlasted a takeover of the company.

The farm where one of America's greatest leaders was raised is now a well-appointed landmark.

Kentucky's anomalous peninsula projecting into the Mississippi River, site of legendary earthquakes and local feuds.

This historic train station has been converted to a locomotive themed hotel.

Once decrepit and slated for demolition, now one of the longest pedestrian bridges in the world.

One Confederate statue that accurately reflects the ugliness of its subject.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

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