The rocky remains of an ancient Greek forest.

Swarms of dainty flying insects swarm into the Petaloudes Valley to get busy.

An autonomous republic of Orthodox monks.

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

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

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.

The hallucinogenic center of the ancient world.

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

Local lore says two enemy dragons live within these breathtaking mountain lakes.

The ruins of an abandoned 18th-century town that is slowly being reclaimed by the forest.

Giant money stones of Yap.

This natural spa is known for its healing properties and vibrant hue.

This amazingly preserved Doric temple was abandoned before it was ever completed.

The eerie ruins of this feudal fortress witnessed the execution of 60 conspirators in 1387.

This 400-year-old house tells a tale of witchcraft and woodwork.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

Deep in the Thar desert, a temple crawling with thousands of holy rats.

The taxidermied remains of Charles Dickens' pet raven, which helped inspire one of Edgar Allan Poe's most famous poems.

This castle resides in a valley known for immense bloodshed during the Middle Ages.

These ancient rune stones plucked from the countryside now call this university park home.

A geological wonder that helped fuel myths of trolls and giants.

The world's only above water sand volcano, believed to once be the bathtub of a priest.

This legendary "evil" doll has been haunting the citizens of Key West for over 100 years.