Civil War Fort on an island in the Boston Harbor.

On a former island, this old fortification once used to protect the Boston Area and started Edgar Allan Poe in his military career.

This roadside attraction attracts kids with dinosaurs before blindsiding them with geology.

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

For 20 years, this whale skeleton has been slowly dripping oil on the floor of the museum where it hangs.

One philanthropist's extensive collection of knick-knacks and curiosities is now a public museum of oddity.

A spooky and decrepit mental health facility is slowly being replaced with newer digs.

Overgrown ruins of a turn of the century island fort that sees very few visitors.

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

Trash escaped from a landfill to fill beaches with all kinds of treasure.

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

Site of a famous 19th-century transcendentalist utopian community, now abandoned.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

Over fifty whirling pools left by the glacial age.

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

Unlike other abandoned asylums this empty institution welcomes visitors, just don't go in the buildings.

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

An eccentric inventor's castle home with its own indoor weather system.

This upscale streetwear store is hidden behind a fake Snapple machine in the back of a deli.

The inspiration for H.P. Lovecraft's horror stories and Batman's Arkham Asylum is now a condominium complex.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

Forgotten under the construction of a new urban roadway is a small, abandoned part of town.

An abandoned Depression-era zoo hidden just off the highway.

A few stone foundations and an old graveyard are all that is left of this once thriving settlement in the wilds of Connecticut.