The lasting remains of a bygone era of open-air meat markets.

A plaque commemorates a Victorian scientist's monumental discovery about waves.

This statue stands as a message against the ills of Apartheid.

This historic timepiece was a popular meeting place for romantic rendezvous in the 1960s.

The artwork mysteriously appeared within an Edinburgh cemetery.

Decades before the scandal, this staircase on the river was a literal "water gate."

The mysterious large white cross visible from the runway is a memorial to a massacre during Spanish Civil War.

One of Madrid's oldest trees, with a long and colorful history, resides in El Retiro Park.

This unassuming bookstore in the heart of Madrid is one of the oldest in Spain.

A whimsical brother of the nearby Fallen Angel statue takes the falling part quite literally.

Among the oldest structures in Madrid, these Moorish walls once guarded the medieval city of Mayrit.

Part of the medieval watchtower is displayed in an otherwise ordinary parking garage.

After the queen of Spain had a dream where these statues fell and crushed her, they were removed from the palace and given new homes around Madrid.

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

The remains of a convent turned military barrack in the heart of Madrid.

Just like in Hollywood, Madrid has also a forgotten walk of fame.

Dedicated to a young woman who broke gender barriers at the University of Madrid.

Artist Natividad Sánchez wrote a new ending for one of Roman mythology's tragic love stories.

In the fictional world of Kcymaerxthaere, celestial wonders marked a portal to a powerful route of travel at this site in Madrid, Spain.

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

These distorting, funhouse mirrors achieved fame in a renowned piece of Spanish theater.

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

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

A lush indoor jungle fills this bustling Madrid transportation hub.