This recently uncovered ad for Lindsay's run at Mayor in 1965 had been hiding for decades underneath a billboard.

The legendary court where emerging basketball players gain their street cred.

This mysterious marker puzzles pedestrians and infuriates geographers.

The oldest pastificio in Queens offers visitors fresh noodles and a peek inside the macaroni-making magic.

An abandoned subway tunnel that could have reinvigorated Staten Island still lies somewhere beneath this Brooklyn park.

A Jewish deli run by Yemeni Muslims in an Afro-Caribbean neighborhood is quintessential Brooklyn.

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

Salute the leader of the proletariat.

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

Come for the pastrami, stay for the million-dollar art.

This plot of old-growth forest is the largest surviving remnant of New York City's original woodland.

Walk into the 19th century without leaving Brooklyn.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

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

Plot your trip through the city on the sidewalk.

The crown jewel of the Queens Museum is a nearly 10,000-square-foot architectural model of the city originally built for the 1964 World's Fair.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

Tucked away amidst some of the most famous addresses in the world is New York's only fraction of a street.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

The "Seinfeld" diner.

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

A crumbling hospital from the 1850s on Roosevelt Island.