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

The phone booths of New York City have all but disappeared, but their remains were once found in this "graveyard," sadly now removed as well.

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

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."

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

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

Recovered suit of a cannibalistic West African gang.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

The one-time epicenter of American songwriting is now a little remembered Manhattan commercial block.

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

A Gothic-style abode built to accommodate the church's three resident peacocks.

Once considered the height of medical modernity, this structure is now the oldest remaining component of Roosevelt Hospital.

Possible relics of the ancient Roman city are hidden in this restaurant's façade.

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

A crumbling staircase in upper Manhattan is all that remains of one of the most important sites in sports history.

Church in Manhattan holds the bloody sock of Padre Pio, among with many other unusual relics.

The 28-foot granite map plots the locations of 40 theaters in New York City.

This Fifth Avenue church has long been the favored worshiping place of Broadway actors and vaudeville performers.

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 sculptural commentary on capitalism pokes up from the East River.

Down a stairway in the East Village, you could once read a plaque describing an alternate history of a fictional version of Manhattan.

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

Hiroshima survivor on Riverside Drive.

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