This quirky hot springs town known to locals as "T or C" was named after a radio show.

A museum dedicated to the alleged Roswell Incident.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

The oldest continuously occupied public building in the United States.

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

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

A unique geological area spiked with wind-carved rocks that resemble teepees.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

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

An urban laboratory.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

An excursion train traverses a picturesque red-rock canyon along the Verde River.

A spiritual vortex among the red rocks in Sedona.

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

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

A reproduction of earth's many biomes.

With print dying, this local paper keeps the lights on by doubling as a stunning cafe and cocktail bar.

A graveyard of bathyspheres and diving bells paints a weirdly accurate account of ocean exploration's rickety history.

Orr Park's dead trees have been carved into a menagerie of whimsical visages.

The second-tallest water tower shaped like a peach in the American South.

Naturally carbonated water fills the mineral baths at this 19th-century California resort.

A trash dump made beautiful by nature's power.

This massive redwood tree has a hole in the base big enough to drive through.

One of the most scenic stretches of road in America winds between some of the country's oldest trees.