An 18th-century Spanish watchtower made entirely of seashell and concrete.

One of the world’s largest living advertisements is made out of pine trees.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

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

The superstar of Cold War nuclear bunkers has been featured in countless films but is now barely operational.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

A multi-storied adobe complex has been inhabited for more than a thousand years.

See massive fossils that are over 200 million years old in northeastern Arizona.

A motel dedicated to Southwestern nostalgia.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

An homage to everyone's favorite prehistoric cartoon family.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

A spiritual vortex among the red rocks in Sedona.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

Everything you always wanted to know about borates is here.

One poet's handmade, anachronistic home.

Haunting and beautiful trees, doomed to die.

The oldest U.S. Government building in California, and it's State Historic Landmark #1.

Two rocks in a perpetual kiss and one of "the most romantic spot in America."

The oldest lighthouse on America's west coast no longer needs keepers, yet they maintain the site anyhow.

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

You don't have to be a diplomat to visit the so-called Camp David of the West.

A museum dedicated to the alleged Roswell Incident.

A museum of unusual collections, mini-towns, and a half-dog, half-alligator.