A cave dug by a man directed by ghosts to find pirate treasure.

The site of the tragic isolation of Nipmuc Native Americans left to perish in King Philip's War.

Second largest wastewater treatment plant in the country.

A memorial dedicated to victims of the Irish Potato Famine who perished while quarantined on this island.

The world's largest piece of copyrighted artwork.

The oldest liquor store in the country is a model of resilience and mischief.

Most historians agree that the so-called "Gentleman Pirate" wasn't much of either of those things.

In Gloucester, Massachussets, fishermen celebrate a successful year at sea by charging a lubed pole to capture an Italian flag.

Visit a sweet shop selling one of the first candies ever made and sold in America.

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

The macabre graffiti spectacle in a quarry in a Massachusetts forest reservation.

The headquarters in Salem doubles as an occult art gallery.

An alley way dedicated to graffiti and street art is a constantly changing street gallery.

19th-century operating theatre in which the use of ether was first demonstrated - plus, a skeleton and a mummy!

A luxury hotel constructed out of a former jail.

The headquarters of one of the world’s longest-running humor magazines bears a noticeable resemblance to a head wearing a Prussian helmet.

A Harvard-area eatery preserves the uncovered tiles of its century-old predecessor.

This hidden labyrinth offers walkers some brief peace of mind.

This abstract roadside poultry was saved from demolition by outraged drivers and pilots.

This evocatively named natural crevasse was created by a torrent of water that smashed right through a granite deposit.

This Tudor-style mansion is home to the first roadside confectioner in the United States.

This historic patch of real estate offers a glimpse of colonial Boston.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

An inclusive, climate-resilient playground honors the life of a young Boston Marathon bombing victim.