A little-known caravanserai hidden among farmhouses in the Turkish countryside.

The only residents of this abandoned housing development full of identical castles are stray cats and dogs.

An ancient church on a tiny island covered in stone bible stories has controversially been turned into a museum.

This shuttered power plant is now Turkey's first industrial archaeology museum.

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.

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.

This sublime architectural marvel is a rare example of an expressionist church.

The oldest ruins at this castle overlooking Georgia's Terek River Valley date back to the 10th century.

This former Cyprus flight hub is now a crumbling, abandoned ghost complex.

Remnants of the Nazis' occupation of Denmark linger along the sand.

Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

Denmark’s never-ending bridge.

This dizzying span over the ancient Algerian city was once the highest suspension bridge in the world.

This village was once a thriving Soviet uranium mining center, but is now semi-abandoned and desolate.

This mysterious complex of abandoned yurts and fading murals was meant to be a center of science and spirituality in Kyrgyzstan.

A stunning blue-green lake located in the Terskey Alatau mountain range.

Lonely minaret stump of a destroyed city.

This retro, UFO-like structure is a remnant of the Soviet-era circus.

An outstanding piece of retro Sci-Fi architecture built into a sacred mountain.

A boulder carved into the shape of the cosmonaut's head.

Extremely isolated Silk Road caravanserai in the middle of nowhere.

One of the few places to grab a beer in Fez is a former British consulate.