This strange sculpture is an enigmatic icon of this medieval German town.

This gateway to subterranean Hanover plays jazz, pop and rock to surprised passersby.

According to a satirical conspiracy theory that persists today, this German city of 300,000 is a hoax invented by the CIA.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

This striking, historic hotel has major Wes Anderson movie energy.

A Serbian church lit by chandeliers made of weapons.

A misnamed well, with a deep dark past.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

This small bronze pyramid marks the center of Belgrade, but some say it is a Masonic symbol.

A pair of connected skyscrapers form this symbolic gateway.

Volkswagen's dedicated museum dives into the complex history of one of the world's best known cars.

A purr-fectly spirited bronze celebration of local street felines through history.

Bursting forth from a historic German neighborhood, these day-glo palaces are now a bright fixture in the town.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

This glass skywalk offers vertiginous views down the volcanic cliffs to the beach below.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

A lush oasis full of vibrant plants and striking geometric displays.

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

A first-of-its-kind circular bridge for cyclists.

Right here, members of the Lewis and Clark expedition boiled ocean water to make salt.

A set of parking garage escalators doubling as a historical overview of Rotterdam.

The world’s largest street art museum.

Destruction from Armenia's 1988 earthquake inspired an artist's sculptures of scrap metal.