Hamburg's first legal sex work is relegated to a gated street that still does not allow pedestrian women.

The former Nazi concentration camp stands as a museum to remember this dark chapter in European history.

These Finnish rapids have been attracting tourists for over a hundred years and are now released with the push of a button.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

A reliquary of pop culture marvels, including the world's largest (and most terrifying) Jack-in-the-Box.

A parade of antique steeds offers a quirky ride through history.

An overlooked monument to the celebrity gangster who helped put the sin in Sin City.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

This insurance company building reminds customers that witches, bears, and gnomes are out there, best be insured.

An abstract monument to a symphonic composer.

Architecturally stunning library serves as the hub of Finnish scholarly life and culture.

A subterranean house of worship carved right out of the bedrock.

This Manhattan skyscraper is a reminder of the brief but glorious age of urban air taxis.

Legendary private island in the Bronx...devoid of rats.

This neo-Gothic former auto showroom is one of the few remaining reminders of Brooklyn's "Automobile Row."

2,000 barrels of aging beer hidden in a warehouse at the Brooklyn Navy Yard.

Oldest surviving example of a Dutch saltbox frame house in America.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

There are owls with glowing eyes in Herald Square.

A millionaire's abandoned swimming pool from the gilded age of one of America's most distinguished families.

Cheap pizza and all of your naughty bedroom needs housed in a stunning example of Art Nouveau architecture.

An eccentric playboy's astounding natural history collection.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.