The highest dunes in California are the most likely place in the area to hear the Singing Sands.

The lowest point in North America is home to an undrinkable pool surrounded by fields of geometric salt flats.

"Only the devil could play golf here."

The most loyal of little dogs, or a Victorian era publicity stunt?

The fountain marks the area where hundreds of accused witches were burned at the stake.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

100 massive sculptures in the Hudson River Valley.

Tucked behind New Jersey's abandoned Gingerbread Castle lie the eerie ruins of a once-flourishing paper mill.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

This little-known collection holds everything from "Dracula" notes, to the manuscript of "Ulysses," to the forged works of Shakespeare.

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

The South African dialect's complex history is immortalized in stone, in one of the world's only monuments dedicated to a language.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

A storefront museum in Asbury Park honoring the Jersey Shore’s deep history of mystery—including the Jersey Devil.

Northern Ireland's Brobdingnagian stepping stones.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

This Victorian-era public house has set the standard for pub-style elegance for over a hundred years.

The world's longest known cave system.

A 70,000-square-foot institution dedicated to a very literal, creationist perspective on the Book of Genesis.

A toxic ghost town sitting atop a massive coal fire.

Once the world's largest reinforced concrete structure, this abandoned bridge now beckons urban explorers.