A park full of outsider art, created by college students studying outsider art.

Mutant vegetables, transgenic mosquitos, and atomic rodents span the walls of this one-of-a-kind museum.

This charming colonial alleyway is one of the oldest continuously used residential streets in the U.S.

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

A toxic ghost town sitting atop a massive coal fire.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

A Natural History and Science Emporium.

Test your business savvy and play the market for cocktails at this stock exchange-inspired watering hole.

The phone booths of New York City have all but disappeared, but their remains were once found in this "graveyard," sadly now removed as well.

A partially hidden wall graffitied by spectators of the 1976 Bicentennial, recently rediscovered.

A graffiti Mecca welcoming artists from around the world.

The saddest little diner in New York.

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

NYC's legendary underground network for bovine transportation.

Three-story slide through the New Museum.

Abandoned 19th century homes once occupied by naval officers, soon to be demolished.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

A museum devoted to bringing to light forgotten or neglected histories through exhibitions, education and public programming.

If you were standing here on October 5th, 1950, you'd be dead.

This recently uncovered ad for Lindsay's run at Mayor in 1965 had been hiding for decades underneath a billboard.

Here be dragons.

A garment factory hides a small Dominican eatery in the hallway to its freight elevator.

The site where Charles Dickens gave his first public reading of "A Christmas Carol" in the US.

This nostalgic blast from the grooming past is also a working barbershop.