A dark, dank room in subterranean Manhattan was the site of a ghastly murder.

Under a glass sidewalk lie the remains of some of Manhattan's oldest buildings.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

Where now stands a 42-story condominium tower of marble, glass and steel was once the central market of New York’s slave trade.

A strangely angled West Village home is the only monument to an explosion that took the lives of three American revolutionaries.

Built hundreds of years ago this downtown iron barrier once protected a much despised king.

The notorious headquarters of a corrupt political machine.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

A no-frills cinephile haven known for showing offbeat, underseen films.

Walk into the 19th century without leaving Brooklyn.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

This innocent-looking townhome is actually a subway exit.

Detailed facade of a brownstone in Boerum Hill.

Behind a bodega is a small museum of relics and ephemera showcasing the history of New York.

A way to take your secrets to someone else's grave.

This seemingly unremarkable boulder is said to bear the hoofprint of the devil himself.

One of the remaining markers of an era when Brooklyn and Flatbush were separate cities.

A beautiful collection of architectural ornaments rescued from demolished New York City buildings.

One of only two remaining Victorian-era greenhouses in New York.

This controversial statue has migrated twice in its life.

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

Tucked in a nondescript downtown Brooklyn mall is a bar containing a remarkable turn of the century anatomical wax collection last seen in 1920s Berlin.

19th century cemetery hidden in Brooklyn's Prospect Park.

Sniff the Titan Arum's rotting flesh.