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

New York City's smallest piece of private property.

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

Unrepaired walls from a 1920 anarchist bomb attack.

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

Avoid gangster interaction while window-shopping.

Try not to get slimed in Tribeca.

The most confusing clock in New York.

Cryptic messages embedded in the New York City sidewalk.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

A three-story copper skybridge connects two Manhattan buildings with Art Deco luxury.

Commemorating the spot where the famous scientist fed his pigeons.

Elevated freight railway turned wildly successful urban park.

A downtown park built on top of unclaimed graves.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

Thanks to a quirk of elevation this gift shop produces magic doughnuts that are found nowhere else on Earth.

While most of the games in this arcade take quarters, that would have been a small fortune when they were made.

These faux-cliff dwellings allow visitors to climb around on a replica archaeological site.

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

Strange red rock formations that have been attributed to a higher power for hundreds of years.