Ruins of a Carnegie family mansion on Cumberland Island.

Not truly a ship nor a building, the Navy's first and last "landship" is now abandoned due to clerical issues.

Holding multiple historical boats and an entire 19th century village, this New England attraction is the largest maritime museum in the world.

Underground tunnels remain beneath this abandoned mental asylum.

The kind of mixed-up place that drives archaeologists crazy.

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The most decorated dog of World War I is preserved in the Smithsonian.

The house where John Wilkes Booth conspired with his co-conspirators.

This museum of Hawaiian and Polynesian culture is the legacy of the last descendant of the Kamehameha Dynasty.

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

The 340-year-old house that inspired the classic Nathaniel Hawthorne novel.

The world's largest piece of copyrighted artwork.

Rising 30 feet in the air atop Quarry Hill, the Old Powder House is the oldest stone building in the state of Massachusetts.

This monument on Breed's Hill proves that one of the most famous battles of the Revolutionary War is misnamed.

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

The tomb of Increase Mather and his son Cotton, influential colonial ministers obsessed with the occult.

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

The site of Paul Revere's historic two lantern warning.

This popular Boston haunt is reminiscent of a time gone by, when slow cafes and sweet-smelling smoke wafting from patios was the norm.

This headstone marks the grave of an 11-year-old boy killed during clashes in the streets over the boycotting of British goods.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

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

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