This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Thousands of rusting train cars have been slowly falling apart on the edge of Greece's second largest city.

Once the largest rope factory in Greece, this abandoned plant now stands like a ghost of industry past.

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

What once sat in the world’s spotlight is today a largely disused ghost complex.

The most metal church of all time was built in record time because of an international, pious pissing contest.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

Live a night as a Byzantine King, with a minibar and private jacuzzi.

A Turkish ghost town abandoned in a population exchange with Greece.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

These tombs were built into the side of a mountain so that ancient angels could reach the dead.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

Hydraulic systems in an ancient underground Iranian city.

Ancient structures used to make and preserve ice in the deserts of Persia.

This beautiful system of tunnels built into natural rock serves as a centuries old plumbing system.

A 1,500-year-old, 3-story subterranean city where ancient Persians took refuge in times of war.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

Iran's colorful terraces are a rare geological masterpiece.

An abused and forgotten metropolis, abandoned for centuries.