A historic observatory precariously perched at the "Top of Europe."

This 13th-century monastery chiseled into the side of a mountain is equipped with a bridge that can be lifted to protect against raids.

This 15th-century island fortress later served as home to the executioners no one wanted to live near.

The hermits of Karoulia protect their asocial lifestyles by living on the vertical face of a treacherous precipice.

An abandoned Byzantine fortress and notorious prison.

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

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

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

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

A two thousand year old brothel uncovered in Northern Greece.

This 200-meter-high waterfall marks the site of Achilles’s immortal baptism at the mouth of the River Styx.

This wrecked ghost ship has been rusting on a Greek beach since the 1980s.

This medieval "painted village" is famous for its geometric facades.

The ruined doorway is a portal to the building's turbulent and torturous past.

Large collection from the 3rd millennium BCE.

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.

The ruins of an ancient Roman tomb hidden in the basement of a trendy clothing store.

Cretean quarry suggests real-life site for ancient Greek myth of the man-eating Minotaur in his labyrinth.

This remarkable cave was discovered after a shepherd watched bees enter and exit through a small fissure.

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

According to myth, Zeus himself was hidden in this cave to escape being eaten by his dad.

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

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.