Visible at low tide, this rusting vessel is one of the last surviving examples of the X-Class "Midget" submarines.

The medley of artwork tells the history of this Scottish town.

Founded as a refugee camp, now a popular tourist spot.

Local authorities nearly destroyed this mural before a viral video rallied international support to save it.

Writers such as Paul Bowles, William Burroughs, and Samuel Beckett frequented this Tangier bookstore.

This iconic cinema is home to Tangier's Cinémathèque and a symbol of the city's vibrant film scene.

A stunning palace haunted by the sinister reputation of its infamous owners.

The designated Jewish quarter in Fez dates back to the 15th century.

This former royal palace with gorgeous gardens became the first museum in Morocco.

The other side is actually green.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

The thirteen wooden beams protruding from this historical building were once part of a hydraulic clock.

The oldest known university in the world is in Fez, Morocco.

Traditional 11th-century outdoor tannery.

A caravanserai turned into a museum showcasing the mastery of local carpenters.

The courtyard of this small Marinid madrasa is a dazzling example of intricate Islamic architecture.

A museum dedicated to the musical instruments used in traditional Moroccan music.

Mosaics, storks, and brothels—this ancient city has it all.

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

This macabre masterpiece of a mural is one of Francisco Goya's "Black Paintings."

It took 40 years to build this Eden-like garden in Marrakech, later restored by Yves Saint-Laurent.

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

A lush indoor jungle fills this bustling Madrid transportation hub.

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