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

An abused and forgotten metropolis, abandoned for centuries.

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

Roman ruins top white travertine terraces formed by ancient hot springs.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

An unfinished complex built for children from around the world sits abandoned on the Black Sea coastline.

Mysterious standing stone formations looks like a petrified forest.

The second-largest Jewish temple in Bulgaria was deserted after World War II, seized by the communist government and then abandoned again.

A flamboyant five-story building in Bulgaria resembles a crawling snail.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

An abandoned saucer-shaped monument in the Bulgarian mountains.

This enormous abandoned prison was once dubbed the "Bastille of Romania."

A spooky spot along the road where things mysteriously seem to move uphill by themselves.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

Romania's only crater lake with water as pure as if distilled.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

The romantic botanic tunnel feels like a well-kept secret.

A giant portrait of an ancient king looms over the river.

Some call this eerie forest of crooked trees the "Bermuda Triangle of Romania."

Conspiracy theories and occult legends surround this mysterious natural rock formation.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.