Stockholm's narrowest alley is barely over two feet wide.

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

Stockholm's deepest subway station is also a stunning ecological wonder.

This Stockholm light tower can be controlled by anyone with a smartphone.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.

A Romanesque sanctuary of calm amid the bustle of downtown Los Angeles.

A Cold War site complete with rusty structures, hiking trails, and beautiful views.

The Mighty Wurlitzer organ continues to belt out the tunes at downtown El Segundo's historic home for silent and classic movies.

Made famous by cable TV, this oddball collection of antiques and collectibles is a cut above the rest.

The artwork that Italians felt California didn't deserve.

Storybook cottage in Beverly Hills was once the site of 1920s silent film studio, affectionately known as "The Witch's House."

A one-of-a-kind collection of a unique medium.

Crypt mausoleum in cathedral's basement contains relics of third century Roman martyr, Saint Vibiana.

Historic marionette theater features thousands of handmade puppets and free cups of ice cream.

The illuminating collection of L.A. street lights is run by the city and only opens one day per month.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

Though the original building has been demolished, these massive bronze doors were saved.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

A morbid gateway to an Alaska town prides itself on the hunting history it represents.

This super-sized statue is the only public memorial to the deal that ended America's neutrality during World War II.

The sculpture's largest spire points directly toward the North Star.

North America's first frozen mummified remains of an ice age steppe bison, the 36,000 year-old mummy named "Blue Babe."

A sarcastic monument threatens to curse any "idiot" who dares remove it.

The site of one of Japan's very few American occupations during World War II still holds the relics of a roundly disastrous campaign.