One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

Elaborate tile work in this railway station tells the story of Portugal.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

A hidden three-foot-wide house separates these two regal churches.

A unique seaside cave where Aleister Crowley faked his own death.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Hidden beneath a beautiful overlook you’ll find the history of the city depicted in comic strip format next to a pay toilet.

Go surfing on this urban wave, "hacked" by local surfers.

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

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

A fearsome dragon clings to a corner of Munich's city hall.

The patron saint of spinsters grasps a container of dried blood.

Oddly enough, a pair of Wolfs funded the construction of this Little Red Riding Hood sculpture.

This lurid German fountain plots the sad course of marriage from dating to death.

This strange sculpture depicts a giant nightmare hare crushing a man to death beneath its colossal bulk.

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

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

This tribute to the 16th-century composer is now an unusual shrine to Michael Jackson.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A narrow passage next to a cafe leads to a courtyard exploding with murals, tags, and paste-ups.

What started as a tongue-in-cheek shrine is now a full-blown museum celebrating "The Hoff" and his longtime love affair with Berlin.

One of downtown Berlin's last reminders of its Communist past.