The first declared National Monument in the United States.

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

Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

When ecosystems collide in the arid Southwest.

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

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The decaying ruins of a failed mining company’s water diversion project cling to the side of a desert canyon.

Two creeks flow out of either end of this canyon in opposite directions.

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

This museum offers an actual time machine back through Colorado's past.

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

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

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

The first park built over a freeway is a brutalist masterwork.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

This working class sculpture pounds his hammer all the livelong day.

A wall of chewing gum moonlights as collective art.

Now housed in a museum, this giant pink elephant stood in downtown Seattle for more than 60 years.

Residents of Fremont in Seattle have considered it the center of the universe since the 1970s.

A giant Troll lurks under one of Seattle's oldest bridges.

From a neon Rapunzel to a bike traffic meter to a street fair color scheme, the most opened drawbridge in the US is a veritable art gallery.

This former coal gasification plant found a curious second life as a popular public park.

The longest and widest floating bridge in the world.