This hidden Art Nouveau courtyard is an opulent feast for the eyes.

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

Rome's semi-secret peephole vista is also a former Crusader stronghold.

Architectureal fantasy quarter of Rome.

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

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

The oldest working bell set in North America, the bells at Old North Church sat silent for their first four years in Massachusetts.

A mysterious stone embedded at the base of a historic Boston building.

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

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

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.

Beautiful steampunk ghosts of early Massachusetts.

One of the now-less-hidden floral gems of the "Emerald Necklace."

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.

An enormous, inside-out glass globe built in 1935.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Carnivorous plants, medieval aphrodisiacs, and the largest original wood structure glass conservatory in the western hemisphere.

A huge musical instrument played by the ocean.

Giant Redwood-themed cafeteria operates under the golden rule, "Dine Free Unless Delighted."

World's largest collection of serial killer artwork and other macabre exhibits.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.