A tradition unlike any other, this marks the site of the annual Groundhog's Day tradition.

A particularly creepy abandoned hospital that sparks interest for lovers of the supernatural.

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

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

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

This one has sailed five times as far as Sir Francis Drake's famous ship.

An unusual round church in London with a Templar past.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Ancient snack bar of the Roman Empire re-opened.

Virgil's many-mouthed gateway to the underworld.

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

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

An otherwise quiet campground becomes a bustling medieval town for two weeks every year.

Despite its lavish ornamentation, and wholesome lifestyle of its devotees, this mountain commune has faced its share of issues.

Beyond the usual stories that attend old prisons, this one has deep bloody undercurrents.