This super steep hike ascends 2,000 feet in less than a mile.

The largest source of fossilized insects anywhere.

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

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

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

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

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

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

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

In rural Iowa, an imported 19th-century windmill overlooks an unlikely enclave of Danish culture.

14th century Norse artifacts in Northwestern Minnesota could have proved a Viking landing before Columbus.

America's largest viking stands in a Minnesota city that believes it was visited by the ancient nords.

At this Minnesota state park you can easily wade across the source of the mighty Mississippi.

Home to a vast collection of The Wizard of Oz memorabilia and the site of an infamous theft.

This picturesque cliffside beacon no longer calls to sailors but shines once a year in honor of a famous shipwreck.

When waves crash onto this section of beach, the rocks sing a song.

This rare vessel mixed luxury with labor before being converted to a museum and sometimes haunted maze.

The watery grave of an impractical idea.

This posh mansion began as a family's estate and ended as the site of a murder ripped from the pages of a pulp novel.

This spiny beast guards an artist's village while vying for the title of largest lobster in the world.

Bat house that has only ever housed bat for one night; they all flew away and never came back.

The highway's southernmost spot is a beloved local attraction.

A monument celebrating the idea of reaching inaccessible places.