For decades, Puerta del Sol has been illuminated by a giant, guitar-wielding bottle of sherry.

Five million people are laid to rest here, more than the population of Madrid itself.

This small and often-overlooked museum holds some of Spain's finest artistic treasures.

The little church's beautifully frescoed ceiling has earned it the nickname “the Sistine Chapel of Madrid.”

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

This funky former tobacco factory is one of the most striking examples of Madrid's cultural diversity.

A lush indoor jungle fills this bustling Madrid transportation hub.

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

One of the most easily accessible examples of the rare 1960s UFO houses.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

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

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

One man's personal kunstkammer, museum and shop.

Housed in an old church, this hunting museum holds a collection of mythical bird-rabbit creatures.

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

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

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

Every equinox this Maya pyramid puts on a spooky ancient light show.

No one knows the meaning behind this giant sculpture of a nude woman with a fork riding a rooster in Havana.

Once a favorite playground for the world's most illustrious guests, Hotel Nacional's secret weapons and bunkers reveal a more menacing side to its golden history.

A focal point of the Cuban government, this city square features one of the most iconic images in the country.

In terms of history and architecture, this is one of the most remarkable cemeteries in the world.

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