A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

Non-profit time travel mart sells goods you would need for a trip through the fourth dimension.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

An artsy hidden staircase leads to breathtaking views of San Francisco.

A huge musical instrument played by the ocean.

The top of the holy mountain for the ancient Spartans looks like a pyramid—is it man-made or a natural phenomenon?

A dark, narrow tunnel that leads to a charming lake and waterfall.

An islet filled with wooden houses where the open sea meets a lagoon.

This pink watchtower served as the seat of the Greek government after independence from the Turks.

This once architecturally advanced housing complex is now a haven for squatters that still bears the scars of war.

This slumbering beast honors the Bavarian soldiers who died in Greece during a 19th-century typhoid outbreak.

The abandoned summer estate of the former Greek Royal Family.

Seventeen oak trees sprout from the roof and walls of this tiny chapel without any visual evidence of roots.

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

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

Poseidon? No one seems to know.

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

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

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

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.

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

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

A spectacular cave and a beguiling lake.