The remarkably well-preserved final resting place of a powerful ancient Thracian king.

UNESCO-protected ancient burial ground.

The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.

A 16th-century horror show built in a lovely Italian garden.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

This former Imperial summer home was the venue for a royal slap that once echoed 'round the world.

A fountain standing as a testament to a doomed alliance.

Over the centuries, this island paradise has done it all, from providing monks with ecclesiastical respite to sheltering an exiled Leon Trotsky.

The ornate miniature mansions were built for Istanbul's feathered residents.

This ancient village and its adjoining cemetery have a beautiful history of death and remembrance.

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

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

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

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.

An abused and forgotten metropolis, abandoned for centuries.

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

A marvel of Byzantine engineering under the streets of Istanbul.

A geological oddity topped with a 2,000-year-old pagan temple.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.