A 60-room castle constructed by a horse-racing heir.

The tennis legend used this racket while breaking the race barrier and becoming the first Black man to win the US Open.

The oldest still-operating tavern in the United States was once owned by a pirate.

Oldest synagogue in the United States.

The second oldest Jewish graveyard in the U.S. is tiny, with connections to George Washington and Henry Wadsworth Longfellow.

A crumbling stone stable and carriage house are all that remain of a manse that was once filled with Egyptian artifacts.

The home of the artist credited with introducing the tomato to the American diet.

Mysterious stone tower featured in many alternative histories of the New World.

A single light illuminates one man's overshadowed contributions to street lamp history.

This Rhode Island mansion was a stand-in for the exteriors of Collinwood in the original "Dark Shadows" series.

Unicorns, elephants, and bears, oh my!

Sacks of potatoes, made of cast stone, mark where the iconic potato sheds once stood along the river.

This Massachusetts home was the first to have a telephone line and its own phone number: 1.

The classic Christmas carol was written at this Massachusetts tavern in 1850.

Memorial of the Salem witchcraft hysteria in the town of Danvers, where it all began.

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

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

This picturesque abandoned home is rumored to be a spite house.

Final resting place of the two women killed on a small island off the coast of New Hampshire.

This small museum is an eccentric shrine to boyhood in the 1960s.

One of the few brewers in the U.S. experimenting with hop-free beers.

Once the future of underwater combat, this old sub is now open for visitors to muck around in.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

The most photographed house in Maine looks good enough to eat.