This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

France's national museum of scientific and industrial instruments.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

Pompeii's less famous neighbor is still revealing her secrets.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

A Bronze age settlement on the Greek island of Santorini might have been the inspiration for Plato's Atlantis.

The oldest stone house in Paris was built by its most famous alchemist.

Museum preserving torture methods from the past.

A giant Troll lurks under one of Seattle's oldest bridges.

An alchemist's “magic door” stands in the middle of a Roman park.

Famously misunderstood wonder of the ancient world

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

A "gravitational anomaly" located in the redwood forests just outside of Santa Cruz, California.

France's most famous cemetery, with some of its most curious tombs.

Try not to get slimed in Tribeca.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Costumed elves and mountain bikers co-exist peacefully at this abandoned Christmas-themed adventure park.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

A hotel and restaurant serving as the mecca of kitsch.

World War II-era Nazi compound nestled in the Santa Monica hills.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

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