This ancient market is often referred to as the oldest shopping mall in the world.

In one of the smallest countries in the world stands an original Salvador Dalí sculpture.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

Madrid's romantically ornate crystal palace has been offering shelter to plants and art for over a century.

A pair of gigantic baby heads greet passengers at Atocha Station.

According to legend a man pooped out the window of this tower to prove that it was straight.

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

Brussels' favorite peeing boy has a sister.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

This classic restaurant features a gorgeous mirror-clad room.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

The non-native bovine herd was brought in to help conserve these Berlin wetlands.

The 1852 novel "Uncle Tom's Cabin" lends its name to a subway station, a street, and several shops on the edge of Berlin.

The world's first and only three-segment bascule bridge folds up into the shape of a capital "N" to let boat traffic through.

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

Named after the German word for "a longingness to travel," this park brings together thousands of city and street signs from around the world.