Little Red Lighthouse under the George Washington Bridge.

A dark patch of the ceiling at Grand Central Terminal which was not restored is still stained brown by tobacco.

The most confusing clock in New York.

A good place to research the Freemasons, esoterica, occultism, and hermeticism.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

Salute the leader of the proletariat.

Commemorating the spot where the famous scientist fed his pigeons.

There must be a pun in this haystack somewhere...

New York City's only radical feminist independent bookstore.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

A hidden "place of interment for gentlemen."

New York City's only preserved family home from the 19th century.

Unrepaired walls from a 1920 anarchist bomb attack.

Cryptic messages embedded in the New York City sidewalk.

Avoid gangster interaction while window-shopping.

An artist's cute bronze subway sculptures belie his violent artistic past.

Plot your trip through the city on the sidewalk.

Lie in a hammock where George Washington stood.

A bit of retro transportation flair preserved in the world's largest department store.

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

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.

A popular European tradition makes its way to the states on one of America's most famous bridges.

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