These slanted cubic abodes are a creative if odd solution to a zoning pickle.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The ruins of a pre-Columbian fortress city so secure it held off the Spanish conquistadors for over 20 years.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

Futuristic apartment blocks are the backdrop for Montreal surfers hangin' ten on the Habitat '67 standing wave.

A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.

This 1967 experiment in modular architecture was designed to be a new model for urban living.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

The skeletal frame of a decommissioned gas-pumping station offers breathtaking views of greater Berlin.

Metro station with a claim to rock n' roll fame.

A fortified city, home to a remaining population of five families

Exploring the wilder, more passionate sibling of Erg Chebbi feels like discovering a secret sun-kissed planet from another galaxy.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

An awe-inspiring mosque in Morocco with one of the tallest minarets in the world.

The ancient heart of Tunis is an enormous maze of narrow streets and alleyways.

An odd little fishing town that is inundated by tourists looking to be locked up in a cage and surrounded by great white sharks, because why not?

Formerly known as the Malay Quarter, Bo Kaap is a colorfully-painted suburb located in the “Mother City” of South Africa.

This African beach is home to thousands of rare mainland penguins that are known for their annoying voice.

Where thousands of slaves passed through the "Door of No Return."

This series of rope-style bridges brings visitors into a jungle layer that is usually reserved for birds and monkeys.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.