Abandoned Coast Artillery fort now serves as a graffiti canvas and sightseeing vantage point.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

Explore the dark underground corridors of this graffiti-covered former military fortification.

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

Narrowest house in Boston.

Stolen goods adorn the organ at Old North Church.

The oldest working bell set in North America, the bells at Old North Church sat silent for their first four years in Massachusetts.

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

A former zoo turned public park, where visitors can hang out in the old animal cages.

It was an experiment to prove that glacial boulders and rocks can be used in constructions and dwelling.

Former abode of notable poet, complete with literary references and stories of ghosts.

America's oldest archaeological site or a muddled case of wishful thinking.

The gravestones in this historic cemetery are carved with mysterious faces.