A mechanized clock where a man fights off a dragon, crab, and rooster.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

France's most famous cemetery, with some of its most curious tombs.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

The ruins of this monumental city founded by the first Roman Emperor are strangely overlooked by most travelers.

A magical, if a bit tacky, 1960s castle conjures up medieval fairytales and Greek mythology.

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

This little-known, 35,000-specimen collection in Greece is a lepidopterist's dream.

Poseidon? No one seems to know.

An autonomous republic of Orthodox monks.

These ruins in Volvi were once at the intersection of the Eastern and Western Worlds.

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

Hideout of thieves, monks, and goat-footed gods.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

150 or so scrounged-up lamps, chandeliers, and lanterns light up this alley in central Athens.

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

This legendary city has been a tourist attraction for centuries.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

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

The hallucinogenic center of the ancient world.

A spectacular cave and a beguiling lake.

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