Wander among the abandoned ruins of this once-powerful medieval town.

This unique temple complex remains off the typical tourist trail.

An Italian hillside ghost town.

A deserted hodgepodge of experimental structures designed by nearby university students.

The remains of a failed attempt at medieval nerdery are hidden deep in the woods of Virginia.

This abandoned fishing settlement may well be the greenest village in the world.

An abandoned outdoor movie theater in the Sinai desert.

L.A.'s oldest operating bowling alley is a beautifully restored homage to its speakeasy days.

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

Beneath a Virginia City bar is the entrance to an abandoned gold mine.

A long spiraling walkway winds through the woods, and around a copper beech tree at the center.

This unusual rock looks like a giant, otherworldly mushroom sprouting atop a cave.

Spend the night in this formerly abandoned traditional Scottish village.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

A spectacular hidden beach in Ireland has the dark, disturbing nickname of "Murder Hole Beach."

The lighthouse central to the 1980s horror classic "The Fog" is, in fact, located in one of the foggiest areas of the Pacific Coast.

Hundreds of caves filled with thousands of centuries-old statues and murals.

Legend has it fairies gathered at the site of this medieval castle.

More than 100 Hindu temples are slowly being swallowed by the forest.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

This charming old building's loose connection with the Scottish Reformer is what saved it from demolition after it split apart.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

One of Western Africa's oldest mosques, this Timbuktu icon has stood for nearly 700 years.

These magnificent city walls rise from the barren sun-baked Spanish plains like something straight out of a fairytale.