A marvel of Byzantine engineering under the streets of Istanbul.

This ancient statue of Dionysus lies unfinished and abandoned in one of Greece's oldest quarries.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

These massive moving sand dunes have swallowed an entire village and are still on the run.

An abandoned film set location for a remote spaceport in a galaxy far, far away hides in the Tunisian desert.

This chimerical bridge/tunnel appears to dead end right into the sea.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Hans Christian Andersen for the postmodern world.

The majority of the highest mountain in Poland is actually located in a different country.

Polish luminaries and masterful folk art find sanctuary in this unique cemetery.

For 200 years, people have flocked to this Polish town to experience the healing powers of salt.

The largest and best-preserved Roman amphitheater in Africa was designed to seat 35,000 people.

An awesome blend of traditional architecture and street art.

Made famous by 'Star Wars,' these troglodyte homes face an uncertain future.

The original film set of Luke Skywalker's Tatooine home from the 'Star Wars' trilogy.

The largest salt lake in the Sahara is mysteriously alluring.

Geothermal resources are cooled in this oddly-shaped structure before being used for irrigation

The original movie set for the home of 'Star Wars' hero Luke Skywalker.

A stunning basket-shaped oasis supplies water to one of Tunisia's holiest cities.

The ruins of a village destroyed by a 22-day flood.

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

Founded in 670, this ancient mosque is an architectural time portal.

This grand hydraulic installation has provided water for townspeople since the Middle Ages.