Known as the "Forgotten City" it was home to industry, riots, artists, squatters, and to one of the largest single disaster fires in New York City.

One of the deadliest American air disasters is nearly forgotten in Brooklyn.

Little Red Lighthouse under the George Washington Bridge.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

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

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

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

A Natural History and Science Emporium.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

A massive forgotten storehouse from 1913 on the Brooklyn Waterfront has a spectacular view of Brooklyn.

A terrific purveyor of natural history objects and curios.

A room in New York City that contains 250 cubic yards of dirt.

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

One kilometer of thick brass rod laid out before your eyes.

Elevated freight railway turned wildly successful urban park.

100 massive sculptures in the Hudson River Valley.

The world’s first penitentiary, meant to be humane, drove men insane.

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

A museum dedicated to exhibiting remarkable outsider art.

One man's attempt to create an artistic wonder on a run-down block in Detroit.

Opulent downtown movie theater now houses cars as an indoor parking garage.

Detroit’s downtown castle is one of the oldest structures in the city.

A wacky two-story folk-art assemblage of carved and found objects, with lights, motion, and sound now in need of financial support.

A Beaux-Arts triumph rises from decades of decay to become the heart of a new innovation district.