A plaque memorializes the Boston location of one of the largest nightclub fires in history.

This railroad tunnel was once the longest in Massachusetts.

The headquarters in Salem doubles as an occult art gallery.

A cave dug by a man directed by ghosts to find pirate treasure.

A museum dedicated to the quirky and colorful world created by Springfield's favorite son.

The ruins of a Massachusetts prison farm can still be found crumbling the woods of a state park.

Life-size bronzes of the Grinch, Cat in the Hat, Yertle the Turtle, Sam-I-Am, and the Lorax—and the author himself.

This small section of the Sleepy Hollow Cemetery is rotten with famous authors' graves.

Ralph Waldo Emerson spent two years living here decades before it became a Frederick Law Olmsted-designed park.

The often-overlooked ruins of one of the first buildings designed by famous landscape architect Frederick Olmsted.

Dim sum, served in a grand old theater.

Museum dedicated to awful artwork.

A historic cemetery filled with quirky faux wood art and unique tombstones.

This golfball sized platinum iridium cylinder is the official starting point for all national weight calibrations

America's first nuclear-powered merchant ship is now a time warp to the atomic age.

The development and impact of electronic media showcased in a picturesque farmhouse in Maryland.

Two dozen pinball games hidden away inside a most unlikely location.

A lawn full of retired spacecraft on display at one of NASA's first research labs.

Ship skeletons haunt Baltimore's waterways.

This beloved Baltimore spot features caged dolls, a giant Pez collection, and many, many mannequins.

Once home to seven different roller coasters, Glen Echo has undergone many transformations since its founding in 1891.

The ruins of this long-abandoned unsuccessful gold mine can still be found.

A 200-year-old bar with a cheeky name claims to have served Edgar Allan Poe his final drink.

An eerie, decaying ghost town destined to fade into the forest.