The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

Ancient pueblos built into the base of a natural canyon wall.

A spiritual vortex among the red rocks in Sedona.

Dramatic river bend surrounds a natural red-rocked pedestal.

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

A tunnel with windows, so you don't miss out on the impressive views.

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

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

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

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

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

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

A hotel with a rich Wild West history of miners and bootleggers.

This spectacular track has run continuously since 1882.

When flour explodes, it's not a pretty sight.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

Home to the Amorphophallus titanum "Corpse Flower," which is among the largest flowers in the world and also smells powerfully of rotting flesh when in bloom.

A toweringly silly piece of modern art has been delighting locals since the 1980s.

The legendary building that needed ghostly approval before being built.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

After Christopher Columbus died, his son built a fancy house to rule from.

Built in 1512, the oldest cathedral in the Americas.

This replica medieval European village in the Dominican Republic was built by a Hollywood set designer.