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

Rummage through this sunken ship, but leave your scuba gear at home.

Commemorating the spot where the famous scientist fed his pigeons.

Walk into the 19th century without leaving Brooklyn.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

This otherwise innocuous bodega was once the headquarters of the most feared assassin's guild in American history.

Touching mementoes from those who didn't make it back from World War I still hang in one of New York's oldest bars.

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

Relics given to a Manhattan church to avoid seizure by the Italian government.

Hidden in one of New York's oldest subway stations is the final remnant of the site of the bizarre Shakespeare Riots.

This iconic tattoo shop has its own onsite museum with artifacts from the early history of modern body art.

An annual extravaganza of Broadway theater memorabilia.

Unrepaired walls from a 1920 anarchist bomb attack.

The name of this tiny pocket park tucked between two buildings on Manhattan's Upper West Side is Latin for its location: "seventy-one."

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

The former hotel where Tesla invented the radio.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

Avoid gangster interaction while window-shopping.

Cryptic messages embedded in the New York City sidewalk.

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.

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

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

“Invented in Key West, Perfected in Brooklyn."

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.