A mural of the Virgin of Guadalupe painted on the rock wall by canyon's religious namesake.

This National Natural Landmark is one of the best examples of a “mass wasting” in the world.

The temporary burial site of the man who shot and killed Jesse James.

The site of the gruesome massacre—and maybe cannibalism—of five men, a tragedy that made Alferd Packer infamous.

Colorado’s second largest natural lake was created by a landslide.

This otherwise unremarkable ski town building marks the site of Butch Cassidy's first robbery.

An enthusiastically interactive mining museum that won't let black lung ruin the fun.

This memorial pays homage to Pueblo's four Medal of Honor recipients.

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

The largest self-built castle in the U.S., six decades in the making.

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

Check out a hidden collection of vintage neon signs.

This historic stone barn is the former home of legendary cattleman Charles “Lonesome Dove” Goodnight.

This naturally-sourced hot spring is now home to a clothing-optional resort.

This 19th century jail was mainly used to incarcerate the drunk and disorderly.

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

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

This narrow cave is revered in Japan as the womb of Mount Fuji.

A small Wyoming town is home to the state's oldest-operating soda fountain.

A memorial to the most decisive Native American victory of the Plains Indian War.

The last physical evidence of the Lewis and Clark trail is one of their autographs etched into this giant rock.

The source of America's longest river is also a historical landmark and the start of a famous nude run.

These giant metal horses graze on a hilltop near the Montana highway.

Modeled after a famous church in Vienna, Austria—but in Helena, Montana.