The lush coastal city of Astoria is riddled with forgotten secret sidewalks.

A Roman-style column in Oregon hides a spiral staircase inside.

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A huge musical instrument played by the ocean.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

The one-time watch house for incoming ships at the Golden Gate now stands abandoned and hidden in trees.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

The White House Situation Room was taken apart in 2006 and shipped to the Ronald Reagan Presidential Library.

A hotel and restaurant serving as the mecca of kitsch.

An old whaling station now serves to give the public a look at the commercial whaling industry, no longer a part of Monterey's economy.

It should come as no surprise that the world's largest artichoke lies in the town that calls itself the "Artichoke Center of the World."

In the "Danish Capital of America," a replica of one of Copenhagen's most iconic buildings.

Stepping away from the glitz of mobsters and casinos to learn about the other history of Vegas.

An enormous illuminated figure dances on the Las Vegas strip.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

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

Thousands of pieces of art have been carved into the rock at the site of an ancient volcanic eruption.

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 museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

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

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