This classic red schoolhouse is said to have been where Mary and her little lamb went to school.

One of the largest public collection of historic armored and military vehicles in North America.

The 100-year-old public collection of a New Hampshire dentist that contains taxidermy, Native American artifacts, and a pair of mummy hands.

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

Museum dedicated to awful artwork.

On top of Gibbet Hill lie the ruins of a lavish turn-of-the-century estate that never quite came to be.

The railroad tunnel nicknamed the "Bloody Pit" for taking the lives of hundreds during its construction.

Ice cream stand, snack bar, and time capsule of milk conveyance.

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

This landmark cemetery in Boston was created more than 300 years ago.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

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

The massive machine creates cracking displays of indoor lightning.

Beautiful steampunk ghosts of early Massachusetts.

A steampunk wonderland that preserves America's history of industrial innovation.

No one really knows how these old hobby horses got here, but the herd keeps growing.

A historic bridge with a lovely acoustic anomaly.

The oldest surviving wood-frame building in North America is still in the family.

From economic backbone of a community to deadly diving hole, these former stone quarries are now a park for rock climbers and graffiti artists.

The ruins of one of the first railroads in the U.S. lie hidden within a neighborhood cul-de-sac.

A historic custom house with ties to George Washington is now a shrine to local nautical history.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

A crumbling hospital from the 1850s on Roosevelt Island.