Video games, body language, and postal history are all on display in this Swiss museum.

Unfinished monument to peace between Turkey and Armenia, long divided by a dispute over genocide.

These ruins once flourished as the capital of the Lydian kingdom, often credited with the invention of metal coinage.

A surprising and unconventional mosque hidden in the subsoil of Istanbul.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

Remnants of successive wars and Muslim colonialism in the 11th century.

This half-forgotten fortress was constructed by the Ottoman conqueror of Constantinople.

A beautiful 19th-century Armenian mansion is preserved above an unassuming cafe.

This ancient abandoned church in a remote part of Turkey is in danger of falling over.

This hidden gem is bathed in beautiful natural light.

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

The eclectic home of a leading Turkish architect is a gorgeous piece of eye candy.

One of the largest wooden constructions in Europe was meant to be a casino, but soon became an orphanage.

This ancient city - home to nine civilizations - is soon to be buried under 200 feet of water.

This ancient subterranean megalopolis is known for the hot oil traps that were installed above each of its entrances.

A mysterious ancient cemetery with Roman sarcophagi and Lycian inscriptions.

The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.

Mausoleum and Holy Seat of Antiochus I of Commagene.

The best-preserved ancient theater in the world.

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

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

A Turkish monastery tucked into a cliff wall.

Roman ruins, natural methane fires and a lovely beach.

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