After a short-lived attempt to bring America in line with the rest of the world, this road was left in metric.

A wild west cemetery in Tombstone, Arizona, provides a window into the Old West.

An old saloon in the West filled with history, and according to some, a few dozen ghosts.

This popular pilgrimage site offers a hole filled with holy healing dirt.

The outcropping is graffitied with the name of the beloved musical Muppet television series.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

A short volcanic hill in Quito doubles as a stellar observation point of an iconic statue.

Legend says if this neo-Gothic basilica is ever officially completed, the world will come to an end.

This small memorial is dedicated to the Perryville State Prison firefighters who perished fighting the Dude Fire in 1990.

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

A spiritual vortex among the red rocks in Sedona.

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

These free-roaming horses were once destined to disappear from the land.

Every Christmas, one Arizona city makes the most of its dry climate by creating an arid desert tannenbaum.

The tragedy of the Japanese internment camps is remembered here by a stark "Soul Consoling Tower."

Once thought to be the oldest living tree in the world, Methuselah was germinated before the Egyptian pyramids were built.

An experimental, automotive replica of Stonehenge.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

The first declared National Monument in the United States.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

A battle between nature and architecture in the Cambodian jungle.

Khmer Rouge's high security prison.

The prototype for all Nazi concentration camps.