Commemorating the spot where the famous scientist fed his pigeons.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

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

Hundreds of antique bank vault locks on display in New York City.

Three-story slide through the New Museum.

The saddest little diner in New York.

Avoid gangster interaction while window-shopping.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Bowl in splendor, if you're lucky.

This semi-hidden Manhattan restaurant is based out of a loading dock.

A very classy 1920s-era bar right in Grand Central Station.

A clock set into the concrete outside a Manhattan jeweler has been telling time underfoot for over a century.

The oldest operating apothecary in the US has treated everyone from Thomas Edison to Mark Twain.

The oldest bibliophilia club in America, with exhibitions on historic books and graphic arts.

Great place to have a drink and a bite to eat in an atmosphere laden with New York's Bohemian past.

An unassuming secret door once led to a legendary watering hole.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

A legendary speakeasy bookstore returns from the brink.

From scholastic to sepulchral - now under reconstruction.

A historic 1890s architectural masterpiece with an iconic clock tower that, once open to the public, now faces an uncertain future.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

Peek through the gates at this oasis from the city, full of Old English charm.