An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

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

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

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

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

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

One of the last Jazz Age "Wonder Theaters" in New York City.

The oldest surviving bridge in New York City, which reopened to pedestrians in 2015.

Wall Street has a new heroine, a bronze statue of a small but fierce girl.

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

Mysterious 500-year-old tapestries depict a unicorn hunt.

Nikola Tesla's former home contains an homage hidden from plain sight.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

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

New York City's smallest piece of private property.

This whimsical group of statues is a favorite of children who love to climb all over Lewis Carroll's beloved characters.

One of only two commuter aerial tramways in the United States.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

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.

One of the most accessible undersea plane wrecks in the world.

This church was transported brick by brick from the ruins of a 16th-century city into Panama City's current historic district.

Marvel of green building techniques that sings with the wind.

The ruins of an early-18th-century complex that could once house up to 12,000 horses.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.