The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

Some of the Old West's most notorious outlaws frequented this mining town.

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

In Tucson a giant metal snake helps pedestrians cross a busy highway.

A rare wayfinding portmanteau of “Street” and “Avenue.”

Legend says train robbers stashed their gold within the depths of this unusual cave.

An early 20th-century jail not far from the infamous Tombstone, Arizona.

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

A reproduction of earth's many biomes.

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

The remote resting place of a notorious Wild West outlaw whose death is shrouded in mystery.

This giant steer-skull edifice refuses to die.

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

Stairs often replace streets on the steep slopes of this old mining town.

The century-old bell and clock tower at UC Berkeley is the third-tallest in the world, and has fossils.

A shape-shifting buy-sell-trade bookstore, born to Beatnik Era spirit.

Guarded by the Angel of Grief, the Stanford family tomb attracts an odd mix of halloween revelry and somber contemplation.

The final resting place of the Emperor of the United States and Protector of Mexico.

A vast city of the dead, where the deceased outnumber the living by more than a million.

A key producer of charcoal iron in the early 1800s, the structure still stands today.

This replica of the Greek structure is in the heart of Nashville.

Home of an evil witch famous within southern folklore.

A wild Hollywood resort thwarted by mosquitoes.

A 16th-century monastery boasts a lush array of plants native to Mexico’s most biodiverse region.