The highest bridge in America was built for an almost unnervingly small amount of money.

This Colorado hiking trail provides a small gold mine of abandoned gold mines.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

The largest source of fossilized insects anywhere.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

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

The site of the "Bone Wars" between two rival paleontologists during the dinosaur rush of the 19th century.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

This now-abandoned outcrop is an important Native American spiritual site, overtaken by European settlers and mining pollution.

This French Canadian classic is a specialty of the oldest continually used church in Minneapolis.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

The oldest continuously occupied public building in the United States.

Within the former ghost town of Cisco is a carefully restored tiny town with one resident and its own art residency.

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

A lavish 16th-century mansion filled with spectacular staircases, fantastic frescoes, and gorgeous gardens.

The vaulted ceiling is home to a scurry of “squirrelgoyles.”

This historic patch of real estate offers a glimpse of colonial Boston.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

A 20-foot-tall egg painted in a traditional Czech patterns by the Czech community in Wilson, Kansas.

Massive still life just off the highway in Kansas.

At one time this small mining village was the highest town in America but now it sits abandoned while the mine churns on.

A 19th-century architectural wonder designed by the "father of the skyscraper."

Curious rock formations in a tiny Kansas state park.

Faceless white figures loom over the city from the rooftop.