See massive fossils that are over 200 million years old in northeastern Arizona.

A unique structure located on the grounds of one of five grand palaces that were built by the Joseon dynasty.

Most-visited and most-photographed slot canyon in the American Southwest.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

Originally conceived as part of a proposed Arizona State Capitol building in the 1950s, this structure built in 2004 stands as a monument to the architect's legacy.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

The location where the iconic movie character declared it was time to go home.

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

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

60 feet of towering steel balances gracefully.

The first life claimed by this record-breaking peak wasn't lost to exposure or a fall but rather lightning.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

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

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

Natural sonic phenomenon comes with a grisly legend of murder and blood.

The oldest continuously occupied public building in the United States.

This giant pocket watch is the third iteration of a local landmark that has been standing just off the Santa Fe Plaza for over 100 years.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

This southwest-styled home in Santa Fe claims to be the oldest house in America thanks to an ancient bit of foundation.

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

A clear blue swimming hole with hidden caves, still unexplored.