Cryptic messages embedded in the New York City sidewalk.

The oldest living tree in Manhattan comes shrouded in sinister legend.

Everyone from Mark Twain to Teddy Roosevelt has a pipe hanging from the walls of this historic chophouse.

Visit the monolithic tomb of America's most famous general.

A hidden "place of interment for gentlemen."

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

One of the most enjoyable bits of history at Coney Island and “the most romantic ride in the world.”

Blighted Irish field and the ruins of a 19th-century cottage on the edge of urban Manhattan.

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

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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.

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

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

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

A celebration of capitalism in Midtown.

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

More gold than anywhere else, ever.

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

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

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

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

A dilapidated dock tells the story of Titanic's missed arrival.

This little museum is built on a theater that was once a wildly elaborate speakeasy.