An early 20th-century bullring converted into a modern shopping center.

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

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

Throughout this shopping mall are medieval ruins that were discovered during the mall's construction.

Nine bronze hands protruding from a wall honor the student uprising that led to the fall of Czechoslovakia's Communist government.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

A turn of the century building boasting some of the most beautiful art nouveau architecture in Prague.

A series of playful yellow penguins share a serious message about the environment.

Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

What looks like a suicide in progress is actually a statue of Sigmund Freud.

Macabre astrological automaton clock dating to the late 1400s.

Cold war icon and onetime "hole" in the iron curtain.

The footprint of a frustrated devil in Munich's Cathedral.

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

The prototype for all Nazi concentration camps.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A small but immensely extravagant palace built by the "Night King."

The fairy tale castle of the "fairy-tale king."

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

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

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

Tiny memorials honor individual victims of the Holocaust.