In the middle of a busy airport, a statue honoring the astronaut who told Houston that Apollo 13 had a problem.

A pair of gargoyles peer into unsuspecting passengers at Denver’s conspiracy-packed airport.

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

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

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

A multiversal transit station located right below a highway interchange.

This massive home was constructed by one of the greatest conservationists in Colorado history.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

A marble cornerstone marks the location of what could have been a presidential palace.

See 150 million-year-old dinosaur tracks and bones dating back to the Jurassic period.

An impressive collection of over 50,000 minerals including moon rock from the Apollo 17 mission.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

A coal fire has been burning underground here since 1896.

The fifth-longest natural arch in the world, and the longest outside China.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

This open-air reconstruction of an Old West town, a cross between a theme park and a museum, provides an immersive historical experience.

This three-mile concrete levee in Pueblo, Colorado was transformed into the world’s longest painting.

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

Check out a hidden collection of vintage neon signs.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

Limestone caves with spectacular showcase chambers.

A reproduction of earth's many biomes.

This small hill features the most notable collection of petroglyphs in Saguaro National Park.

During World War II this was the site of an "honor camp" used as a prison for draft dodgers, Native American conscientious objectors, and Japanese-Americans—including a man who brought his case against the camp to the Supreme Court.