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.

This ordinary street was made infamous by a legendary visit from the devil.

Bored potato-guarding Nazis etched their thoughts onto a brick storage building in Copenhagen's Meatpacking District.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Copenhagen's celebrated theme park and gardens.

This pair of gilded girls atop an Art Deco building in Copenhagen were built to function as a weather indicator.

A rare example of World War I trenches from the British front.

In the shadow of a former battleground, the resting place for nearly 2,000 soldiers who died in World War I.

This memorial museum chronicles the apocalyptic destruction of the First World War.

A moving memorial to the fallen and missing from WWI trenches.

You can spot this teeny tiny stained-glass window from the Bonifacius bridge.

The compass on its front was a handy tool for 17th-century merchants who needed to know the direction of the wind.

A piece of stonework relief commemorates the site where the Devil's rage, and odd apparel, destroyed a house.

This ex-prison dates back to the Middle Ages.

Captain America, Sub-Mariner, and the Human Torch were all born in this art deco Manhattan masterpiece.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

Commemorating the spot where the famous scientist fed his pigeons.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

The self-proclaimed gateway to the Extraterrestrial Highway.

The bullet-riddled wall from the St. Valentine's Day Massacre, bloodstains enhanced for your viewing pleasure.

A Norwegian-born sculptor created these soaring guardian angels at the entrance to Hoover Dam.