A fortified medieval basilica on the Caelian Hill preserves extraordinary frescoes and one of Rome's most beautiful hidden cloisters.

Its interior is adorned with some of the best examples of early Christian mosaics.

Ancient ruins hidden underneath a modern luxury hotel.

An ancient Egyptian obelisk is now used to commemorate fallen Italian soldiers.

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

A sculpture serving as an homage to Pope John Paul II.

The San Marino-Rimini railroad was short-lived but this tunnel once provided shelter for hundreds of refugees during World War II.

High in the clouds of San Marino sits an ancient tower with some curious prisoner graffiti.

Where members of the Crossbow Corps of San Marino demonstrate their skills.

The smaller of the three towers of San Marino is a former prison inaccessible from the ground level.

The tomb of one of the greatest travelers in history.

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 stucco building in North Africa was the first American-owned property on foreign soil.

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

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

One of the few places to grab a beer in Fez is a former British consulate.

Traditional 11th-century outdoor tannery.

The other side is actually green.

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

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

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

God's Saharan sandbox of wrath.

One of the most spectacular canyons in the world.