This grand gate once marked the entrance to a military barracks.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

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

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

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

One of Madrid's most beloved statues is of an anonymous citizen.

An ancient Egyptian temple in the middle of Madrid, Spain.

Inaugurated three times, this tower offers some of the best views of Madrid.

Along the pavement of this neighborhood in Madrid are quotes from famous authors.

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

A haven for book enthusiasts across the street from Retiro Park.

The remains of this misplaced church were moved here stone by stone.

Commonly acknowledged as the only public monument to the Devil himself.

This influential Renaissance-era library was once the haunt of kings and monks.

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

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

Once a resting spot for King Fernando VII.

A displaced shrine that was put back after a string of bad luck.

The original shop where the iconic Belgian praline was invented.

The world’s second-largest flood defense barrier has protected London for decades.

Nepal's unclimbable sacred peak.

This modern museum of Mediterranean culture is surrounded by a surreal concrete honeycomb.

What if all public housing projects had been designed by "the Pygmalion of modern architecture," not only their prototype?

"Drunken ship" sculpture memorializing the French poet in the city where he died.