This abandoned factory on the Hudson River once churned out a million bricks a week.

This mouldering abandoned mental hospital was once a center for progressive healing.

Detailed facade of a brownstone in Boerum Hill.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

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

Collapsing castle on the Hudson river was once the storage site of military surplus business.

A bit of retro transportation flair preserved in the world's largest department store.

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

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

A sealed test tube said to hold Thomas Edison's dying breath was given to the inventor's friend and mentee, Henry Ford.