The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

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

A huge musical instrument played by the ocean.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.

Sail through this subterranean show cave that is home to a legend that would go on to name nearly everything around it.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

Mysterious rocks that ring musically when struck.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

World's first "penitentiary," meant to be humane, drove men insane.

One of the indelible moments of the American Revolution took place at this location.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

Historic Hull Street was actually the first street with a proper name in the Boston area.

The first bell ever cast in Boston was cast by Paul Revere...and sounded terrible.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The history of the tea trade is told in bas-relief on this historic pair of Boston doors.

"Mock all and sundry things, but leave the saints alone."

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

The Boston square dedicated to the dark poet who was born nearby.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.