A small island with shimmering pink sands, home to loggerhead turtles and rare plants.

A little-known park with unusual, half-ruined structures and a mystical energy.

This field of half-buried stone crosses was the burial place of a sect of heretical gnostics.

This secret coastal village is studded with pastel-colored houses all piled on top of one another.

Poseidon? No one seems to know.

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

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

Ancient Greek oracle of the dead.

A quirky bookstore hidden beneath a sea of whitewashed Greek villas.

Giant marble phalluses on the sacred island of antiquity.

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

This legendary city has been a tourist attraction for centuries.

A spectacular cave and a beguiling lake.

The hallucinogenic center of the ancient world.

An off-the-beaten-path place to literally hang beneath Milwaukee's Holton Street Bridge.

A place to eat for on-the-run agents and espionage enthusiasts.

A large circus museum with summer performances.

A theme park attraction designed to turn your children into LARPers.

Robots, lasers, and whoopee cushions, oh my!

A 140-year-old castle with underground caves hidden in San Francisco.

A typical "Old South" manor, once owned by author Anne Rice, served as the setting for several of her witchcraft sagas.

This colorful New Orleans bookstore features rare and used titles, with a specialty in Cajun fare.

Introducing the Green Fairy to her fawning masses.

Site of a former hidden treehouse in New Orleans.