Hidden behind a gate in Greenwich Village is a little farmhouse that once served as the writing studio of a bestselling author.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

A popular legend claims that the famous pizza was invented at a restaurant in this alley.

The first KFC is on the National Register of Historic Places.

This 220-year-old house is a reminder of New York City's Dutch past.

This unmarked and unloved Manhattan subway grate created one of the most iconic images in American cinema.

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.

The "Seinfeld" diner.

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

New York City's smallest piece of private property.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

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

A beautiful and abandoned New York subway station from 1904, complete with chandelier.

A large boulder marks the place where the island of Manhattan was purportedly "sold" to the Dutch.

This Manhattan museum houses one of the largest collections of Spanish art and manuscripts outside of Spain.

Imagine having a street run right through your home, or better yet, a historic bridge three stories high.

This Dutch Colonial home is the oldest remaining farmhouse in Manhattan.

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 discreet little stairway on St. Nicholas Avenue leads to a quaint and unexpected cobblestone street of 19th century wooden rowhouses.

Curious crustaceans support an obelisk from ancient Egypt that now stands in modern-day Central Park.

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