You can still ride this 100-year-old work of art in Brooklyn's largest public park.

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

The first and only carousel with a lineup entirely of insects.

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.

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

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

Sniff the Titan Arum's rotting flesh.

Ride the subways of yesteryear.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

A tiny museum housed in a New York freight elevator specializes in the "overlooked, dismissed, or ignored."

Hundreds of thousands of ancient documents offer a unique glimpse into Jewish life in Cairo.

Standing atop 2nd-century Roman ruins, this church is one of the oldest and most iconic in Old Cairo.

These Egyptian statues have survived for 3,400 years and were an acoustic wonder of the ancient world.

Nikola Tesla's former home contains an homage hidden from plain sight.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

The mummified relics of an American missionary.

An odd, ancient window that may have once been part of a brutal prison is embedded in the side of New York's Police Plaza.

A good place to research the Freemasons, esoterica, occultism, and hermeticism.

Walk over a 150 year old manhole.

A treasure trove of artifacts, books, and artwork from the "golden age" of exploration.

Tucked in the back of this amazing antique store is an important piece of medical history.

One kilometer of thick brass rod laid out before your eyes.

A room in New York City that contains 250 cubic yards of dirt worth a million dollars.

In the days before house numbers, these colorful signs held clues about various buildings' purposes.