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

A self-built castle made by a mysterious man.

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

The world's largest rose bush has literally outgrown the pioneer museum it was planted behind.

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

A $100,000 tumbleweed decorates an Arizona park and ride that got its priorities a bit tangled.

What is the Thing?

Limestone caves with spectacular showcase chambers.

This giant steer-skull edifice refuses to die.

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

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

America's only nuclear missile silo open to the public.

This southwestern historic site was designed and built by an artist who wanted his work to "feel at home."

What happens here stays here – unless it affects the whole world.

Ever wanted the laymen's version of your credit card fine print?

The "Seinfeld" diner.

Elevated freight railway turned wildly successful urban park.

This fortress in Honduras was built to resist pirates, but its builders had more to fear from the British.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

A bit of retro transportation flair preserved in the world's largest department store.