This abandoned subway station can still be seen on regular commuter trips.

One man's swirling six-acre monument of stone.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

During the holidays, a vintage subway train whisks New Yorkers back in time.

Wine bottle sculpture with a ship's stateroom inside.

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

A living archive of urban activism and space reclaimed.

A long abandoned hospital building on the outskirts of NYC.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

The beautiful tunnel that ran from the lobby to Penn Station is still hidden underneath 34th Street.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

One of the last Jazz Age "Wonder Theaters" in New York City.

Unlock the secrets of the conjuring arts.

A popular European tradition makes its way to the states on one of America's most famous bridges.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

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

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

Ride the subways of yesteryear.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

An unassuming secret door once led to a legendary watering hole.

A natural gas leak provides a flickering flame beneath a waterfall.

A hands-on traveling collection of the innovative devices of yesteryear.

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