An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

The most radioactive spot in New York City can also fix your muffler.

This slender three-story building has also had several famous residents.

A memorial to the first person killed by a motor vehicle in the Western Hemisphere.

This translucent sculpture represents a quintessential component of New York City's skyline.

Recovered suit of a cannibalistic West African gang.

Manhattan's deadly West Side railroad, which killed hundreds of New Yorkers, is remembered by this simple plaque.

This anonymous businessman sculpted in bronze became an enduring memorial after 9/11, and had been mistaken by rescue workers for a survivor in the rubble.

A plaque immortalizes the spot where the early American spy said his famous last words: "I only regret that I have but one life to lose for my country."

A self-made museum in Queens, New York continues to display the work of a sculptor known for paving his own way.

The front yard of an Upper East Side town house hides the last fragment of one of New York's most famous theatres.

Long-forgotten artifacts give incredible insight into New York's most glamorous hotel.

Rat sculptures try to infiltrate the Graybar Building in an architectural tribute to New York City's nautical history.

An arcade packed with a rotating collection of unique independent video games.

The highest point on the island known for buildings that touch the sky.

This curved Manhattan building was built to house the opulence of John D. Rockefeller's oil empire.

A sculptural commentary on capitalism pokes up from the East River.

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

Empty, but not abandoned, this cavernous Brooklyn loading dock was once considered the largest individual building in the world.

The notorious headquarters of a corrupt political machine.

A modern zoetrope on the New York City subway.

A staggering collection of photographs depicting medical, social, and historical change.

This abandoned seaside fortress is now simply an imposing ruin being taken back by nature.

This iconic tattoo shop has its own onsite museum with artifacts from the early history of modern body art.