This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

This memorial pyramid marker honors one of the United States Government's first official camel riders.

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

This abandoned horse racing track was an exercise in hubris from its inception.

Take a monster truck tour around an ostrich farm in the middle of the desert.

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

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

Limestone caves with spectacular showcase chambers.

This historic tower in the California desert promises visitors a "vortex of good vibes".

The Giant Lemon of Lemon Grove.

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

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

A geological mystery on Camelback Mountain.

This reclusive Hopi village in Arizona has been continuously populated longer than anywhere else in America.

A mysterious "wedding cake" castle in the middle of the urban desert.

More than 700 species live within this murky marvel of a swamp on California's coast.

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

The Laureates here get something even more coveted than a Nobel Prize: free parking for life.

Handmade treasures from around the world.

Worker-owned cooperative and resource for those looking to lighten their ecological footprint.

This Virginia town has been famous for its fried chicken since the 19th century.

Nationwide network of co-ownership underground catastrophe shelters.

The "Fun Spot of the Desert" is now a haunting ruin, and a reminder that putting a water park in a desert is a bad idea.

The world’s largest concentrated solar plant generates as many problems as megawatts.