The lecture hall where Alexander Graham Bell first demonstrated the long-distance phone call.

A museum dedicated exclusively to the lore and history of ouija boards.

A simple but powerful tribute to the 20 victims of the 1692 witch trials.

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The world's largest piece of copyrighted artwork.

Ice cream stand, snack bar, and time capsule of milk conveyance.

A beacon atop a downtown building provides Bostonians with weather forecasts and baseball news.

The largest body of water in Massachusetts annihilated four small towns just to slake Boston's thirst.

Mass Grave of 48 colonists killed in a raid by Native Americans and the French in 1704.

The home of an antique carousel still in operation.

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

This extraordinary Depression-era expenditure was modeled after a postcard of a Mediterranean hotel.

These unusual rooms on wheels are holdovers from the 1960s.

Down the road from where the Wright brothers lifted off is another flight tribute practically hidden from sight in the woods.

A monument to a survivor of harsh pioneer life, frostbite, and primitive surgery.

A stoic rock cairn is all that remains to remember one of the more brutal instances of frontier treachery in American history.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

An architectural oddity hides in plain sight on this iconic London bridge.

This unassuming alcove in London’s famous Tower Bridge once served to capture, store, and display dead bodies from the River Thames.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

If you’ve ever seen a picture of Machu Picchu, then you’ve seen a picture of Huayna Picchu—you just didn’t realize it.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

A monument to the conquistador became increasingly controversial in the very city that he founded.