The site of a tragic massacre that spawned a multimedia franchise.

Manhattan's lighthouse, erected at the insistence of the unsinkable Molly Brown.

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

Lie in a hammock where George Washington stood.

An accidentally hidden library containing the ephemeral history of New York.

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

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

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 name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

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

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

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

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

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

Elevated freight railway turned wildly successful urban park.

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

Two thousand artifacts from around the world collected by one woman who loved to travel.

Beautiful hillside Vermont cemetery with amazing funerary art.

True to its name, this bouncy walkway may be the world’s smallest suspension bridge.

As its grandiose name implies, this wooden dome is unsurpassed in size.

The oldest continuously operating fish market in the United States.

Washington's iconic carousel has a nice piece of Civil Rights history.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

This seemingly out-of-place gas station by the Watergate hotel was once described as the most expensive gas station in the world.