The yawning maw of this pagan visage is said to bite off the hands of liars.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

Go inside to really appreciate this 500-year-old technological masterpiece.

This haunted hotel built on natural springs once served as a hospital for a quack doctor promising a cure for cancer.

An oil baron's wild paradise and the winner of an ill-fated air race.

An acoustic anomaly with a mysterious cause sits in the heart of Tulsa.

2300-year-old Roman road connecting the empire.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

The final resting place of the poets Shelley and Keats.

The Pope’s secret escape route.

The celebrated eyesore created by starry-eyed sweethearts.

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

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A walk through the historic city center, under the streets of Seattle.

Famously misunderstood wonder of the ancient world

Europe's largest prehistoric mound – burial site of a legendary king?

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

A beautiful geyser under environmental threat.