One of the largest single-span stone-arch bridges in the Balkans looks like something straight out of a fairytale.

This wrecked ghost ship has been rusting on a Greek beach since the 1980s.

This abandoned Greek island was the last active leper colony in Europe.

An alien landscape on the banks of the Aegean Sea.

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

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

A cave network located at the southernmost tip of mainland Greece was once believed to be an entrance to Hades.

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

Monasteries on rock pillars, once accessible only by frayed ropes.

The observation point offers spectacular views of the ruins of an ancient Armenian capital.

The ruins of a medieval monastery built on a perilous slope.

The luxurious circular mansion built for a Communist leader now lies abandoned.

The most visited pilgrimage site in Armenia once held a saint in a pit for 13 years.

A scenic canyon with thick forests and historic ruins.

What might be the largest completely Jewish town in the world outside of Israel now faces dwindling numbers and empty streets.

Mysterious hillside with a continuously burning natural fire.

This hidden gem is bathed in beautiful natural light.

An Art Nouveau gem hides beneath the layers of city grime obscuring this once-magnificent building.

A sacred lake with thousands of sacred carp and a biblical history.

Standing proud atop a Turkish bluff, this Ottoman palace has retained its grandeur despite being abandoned for centuries.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

Roman ruins, natural methane fires and a lovely beach.

Ottoman-era houses lovingly preserved.

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.