Abandoned power station once home to a squatter community, now being developed into an arts center.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

The loneliest island in New York.

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

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

Finally, you don't have to be a pious Swedish seaman to relax like one.

Cryptic messages embedded in the New York City sidewalk.

Check out the underground party scene at the "Burning Man of Brooklyn."

Love, knishes, and best wishes from this legendary Lower East Side bakery.

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

The "Seinfeld" diner.

A serene but haunting memorial to protective wetland lost, the absence of which directly damaged the Lower 9th Ward following Hurricane Katrina.

An otherworldly musical haven in The Big Easy.

The restaurant keeps a hidden séance room on the second floor and reserves a table for the spirit of the former owner each night.

One of the oldest continuously-operated gay bars in the United States is allegedly haunted by Truman Capote and Tennessee Williams.