Long before guestbooks and hotels, frontier travelers signed their names on this rock face.

From this scenic rockface, you can still see the paths Western pioneers followed.

This erect, phallic geological spire wasn't always named so domestically.

This old-school soda shop is the home of the Tin Roof Sundae, a concoction dripping in chocolate, marshmallow, and peanuts.

The remains of a World War II-era Japanese American internment camp dot a windswept Colorado hill.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

Cool down and fill up after visiting Teotihuacán at this bar and restaurant in a deep, underground cave.

Frida Kahlo's childhood home, now a museum of her life and works.

This gallery is home to everything from antiques, to ancient tribal masks.

The hallowed ground of one of the worst atrocities in United States history.

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

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

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

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

This museum offers an actual time machine back through Colorado's past.

The largest source of fossilized insects anywhere.

When ecosystems collide in the arid Southwest.

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

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

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

This 1930s-era Route 66 Tulsa landmark was moved, restored, and filled with neon.