The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

One of the last remaining World War II Victory Gardens in the U.S. is quietly growing across from Fenway Park.

This impressive Boston holy house is the American mecca for Christian scientists.

This supermarket is suspended 25 feet above an interstate highway.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

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

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

What was once a true peninsula has now been filled in, causing the water to recede and leaving many streetside "waterfronts" and landlocked "islands."

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

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

Impossibly life-like natural history models created out of glass by a father and son.

Three prestigious academic collections come together to create a world-class natural history museum.

The statue of John Harvard isn't actually John Harvard—or even, technically, the founder of the school.

This bridge was the birthplace of a unit of measurement based on a fraternity joke.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

The mysterious canine hides atop a drain pipe on the back of the building, some say as a sneaky shoutout to Yale.

An overlooked memorial honoring the local Washington residents who died in World War I.

Those with a sharp eye can find the hidden image of a German Shepherd on the memorial's Mural Wall.

A little marble compass above George Washington's (empty) tomb in the Capitol marks where D.C.'s four quadrants intersect.

The walls of the iconic dome are hollow and have a secret stairway.

Rumor has it the uncarved lump behind the three famous suffragists is reserved for the first woman president.

While most wind tunnels test scale models, the "Cave of Winds" was large enough for actual airplanes.