The remains of a failed subway in upstate New York is now an underground graffiti bunker.

A pre-Industrial Age iron furnace and the site of a nearly-forgotten piece of Black history.

A tiny piece of the Moon is embedded in this stained glass masterpiece.

The trials and tribulations of marking Poe's grave.

World's first "penitentiary," meant to be humane, drove men insane.

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

The universally beloved children's television figure is interred on a high hilltop in one of western Pennsylvania's oldest cemeteries.

The oldest continuously inhabited street in America.

This stone gatehouse was once the entrance to a historic mountain resort, and it had a cameo in a cheesy cult horror movie.

This forlorn park is the result of a failed investment turned tax dodge.

The home of one of America's most wealthy industrialists is now a historic site that remembers a more decadent time in the country's history.

This tiny church near Sleepy Hollow contains Henri Matisse's last work, a rose window, and nine windows by Marc Chagall.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

The rough and tumble president's childhood home displays the shirt he was once shot in and the speech that saved him.

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

The most confusing clock in New York.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

Monument to a forgotten NYC disaster that claimed the lives of 1,000.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

Relics given to a Manhattan church to avoid seizure by the Italian government.

Walk over a 150 year old manhole.

A museum collection honoring the long history of the FDNY is held in a disused Manhattan fire house.

New York City's smallest piece of private property.