This weird abode has inspired everything from the "House On Haunted Hil" to a robot hunter's pad.

A farm turned upside down.

This museum honors the young maritime hero who became an unexpected Victorian-era celebrity.

This tidal island, a sacred site in early English Christianity, was the target of a notable Viking invasion.

The ruins of a sixth-century monastery sit on the banks of the River Shannon.

San Francisco's first World's Fair, dedicated to the wonders of California.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

San Franciscans leave gifts and messages for the magical beings that live behind the tiny, mysterious door installed on a tree in Golden Gate Park.

The city is full of whimsical portals to another world.

Hell on Earth is actually a small town in Michigan where anyone can be mayor for a day.

This Tuscan lake hides a 13th century town that is still visible when the water recedes.

The crumbling remains of a 19th-century textile factory.

This warehouse-gallery-shop hybrid showcases Mexican craftwork at its best.

The little-known, 300-year history of the area includes former lives as a bustling tobacco port, parking lot, and industrial dump.

At 207 feet, one of the world's longest continuous escalators.

Where Aleister Crowley attempted to seize the Hermetic Order of the Golden Dawn in a mask and a kilt.

Astonishing rock formations dot the Brimham Moor landscape.

One was an astronomer who spent his life chasing solar eclipses, the other helped make Emily Dickinson famous.

A unique collection of more than 250 rocks and minerals located on a university campus.

The only remnant of a small mining town is an abandoned railroad tunnel that is steeped in ghostly lore.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

A 40-foot waterfall flows into this unique natural swimming hole.

This magnificent blue mosque in Afghanistan is surrounded by thousands of white doves.

A temple dedicated to the 13th-century Alevi Turkish dervish credited with bringing Islam to the Balkans.