Grave of the man allegedly responsible for a series of infamous murders in Boston in the 1960s.

An enormous, inside-out glass globe built in 1935.

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

This fairy tale-themed amusement park is now abandoned, and childhood metaphors abound.

This small-town pizzeria won the Hollywood lottery.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A very classy 1920s-era bar right in Grand Central Station.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

Try not to get slimed in Tribeca.

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

An accidentally hidden library containing the ephemeral history of New York.

On the top floor of an upscale department store stands a lavish restaurant housed in a replica of a luxury French dining car.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

A dilapidated dock tells the story of Titanic's missed arrival.

This palatial botanical garden is home to one of the largest pipe organs ever installed in a private residence, and a piece of Wood's cycad.

An abandoned stretch of highway, deteriorating next to the operational one.

Hellam Township is reputed to feature seven remote gates, which when passed through in the right order, open an entrance to hell.

The Home and murder site of the witch of Rehmeyers Hollow.

A former Oz-themed attraction that has fallen into disrepair, but still holds some of the original magic.

This abandoned amusement park was built on a site with a dark history.