Legend says this sacred tree was a gift from goddess Athena.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

This abandoned Greek island was the last active leper colony in Europe.

This famous archeological mystery may be an ancient example of movable type.

This legendary city has been a tourist attraction for centuries.

A terrific purveyor of natural history objects and curios.

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

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

The hallucinogenic center of the ancient world.

There are many Byzantine-era churches still standing in Athens, but this is the only one with a 2,500-year-old column rising through its roof.

A 200-year-old bar in the historic French Quarter refuses to give up its place in history, nor its role in securing ours.

A museum and shop on Bourbon Street located in the French Quarter.

The second oldest continuously operating bar in Louisiana.

This symbolic piece of New Orleans architecture is also home to a few ghastly stories.

This unique shop is full of memento mori art, antique medical equipment, secret society paraphernalia, and historical relics.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

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

The narrowest street in Paris.

One of the last umbrella repair shops in Paris upholds the nostalgic art of umbrella making.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

Noirish green neon marks the location of one of the oldest private detective agencies in France.

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

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

An early life spent in this "Old Kentucky Home" inspired the writings of North Carolina's most famous novelist.