Narrowest house in Boston.

This parking garage was the site of what was - at the time - the largest cash robbery in history.

This historic graveyard monument is dedicated to a tragic victim of witch trial hysteria.

After the attack on Pearl Harbor, rocks and fossils from every U.S. state were collected into a pyramid of national unity.

It's a pretty creepy lock-up.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

Intertwined, interspecies trees which locals believe can grant boons to lovers.

St. Augustine's record-setting narrow street was designed to protect against pirates.

A vast array of tropical plants collected by a vacationing couple.

An unusually designed bridge from the 1920s was built to withstand the tides and winds of Maine.

This museum on a college campus pays tribute to the Arctic and to two explorer alumni.

When the town wouldn't allow the fast-food behemoth to build a new restaurant, they put one inside an 1850 home.

This tiny patch of arid sand sits in one of the greenest states in the United States.

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.

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

Elevated freight railway turned wildly successful urban park.

An eccentric inventor's castle home with its own indoor weather system.

The oldest living cultivated fruit tree in North America.

The headquarters in Salem doubles as an occult art gallery.

Located just behind a quiet residential neighborhood, this is ground zero for the Salem witchcraft hysteria of 1692.

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

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

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