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

The first museum in the United States dedicated entirely to posters.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

“Invented in Key West, Perfected in Brooklyn."

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

Mysterious 500-year-old tapestries depict a unicorn hunt.

Ride the subways of yesteryear.

These enormous, stern-faced statues greet visitors with lanterns, and sometimes costumes.

This ten-ton fruit sculpture celebrates the Finland homeland.

An abstract monument to a symphonic composer.

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

Maybe the only restaurant in the world where your seat will be signed by a Nobel laureate.

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

Stockholm's tiniest statue is of a small boy looking at the Moon.

Sweden's "good old days" painstakingly re-created in a model village.

It houses the remains of a 17th-century version of the Titanic.

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

The design of this beautifully crafted building was inspired by Norwegian glaciers.

This floating sculpture of ice is a poignant reminder of nature's power.

Housing the famous Norwegian ice-defying 19th century polar exploration ship.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.