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

The eccentric mansion of one of the most popular horror authors of modern times.

An overgrown and abandoned tuberculosis ward resides in the midst of a quaint modern neighborhood.

Ruins of a historic medical facility sits eerily by the water.

Quirky castle designed by the American actor best known for portraying Sherlock Holmes on stage.

The macabre paintings created by famous suicide proponent Jack Kevorkian, or "Dr. Death."

This statue intended for children to enjoy became a minor political spat.

A quiet memorial marks the spot where the victims of the Salem Witch Trials were executed.

The largest collection of historic military firearms in the United States.

The world's largest piece of copyrighted artwork.

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

This home is steeped in history from, George Washington to George Corwin, High Sheriff during the Salem Witch Trials.

Plymouth's huge yet little-known memorial to the Pilgrims.

Dedicated to one of the darkest moments in Irish history.

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

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

This area was once known for being a lawless haven for rough-and-tumble sailors, earning the maritime-themed nickname "the black sea."

Tragedy on Little Brewster Island memorialized.

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

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

An easy-to-miss garden in Boston's North End honors the mother of JFK and others who lost children in WWII.

A more than 260-year-old crypt built on Boston's oldest English burial ground.

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