Millions of numbers carved in glass represent the tattoos forced upon victims.

The first declared National Monument in the United States.

This cannonball embedded in the side of an Edinburgh house once served a surprisingly pedestrian purpose.

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

A monument to the real explorer and bear who inspired characters in Philip Pullman's 'His Dark Materials.'

Mural fragments and various sculptures honor the longtime artist.

This extinct volcano rises above Edinburgh and is special for its panoramic views over the city.

The arch that celebrated the completion of the Lincoln and Victory highways.

Dedicated to "the father of U.S. life insurance."

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

The recreated ruins of a house designed to memorialize a World War I shelling on the town.

The headquarters in Salem doubles as an occult art gallery.

A quiet memorial marks the spot where the victims of the Salem Witch Trials were executed.

Like stepping into a spooky fairy-tale, this shop carries the dark ideas of artists and other makers.

Abandoned Italianate architecture on the coast of Maine.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

This home is steeped in history from, George Washington to George Corwin, High Sheriff during the Salem Witch Trials.

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

Statue in Salem of the woman who starred as the witch Samantha in the sitcom "Bewitched."

A collection of full-size movie monsters opened to the public.

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

This restaurant's specialty is "a major enigma for food historians."

The ruins of a Massachusetts prison farm can still be found crumbling the woods of a state park.

The only surviving building of historic West Boylston, which was flooded to create the Wachusett Reservoir.