Mysterious 500-year-old tapestries depict a unicorn hunt.

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

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

New York City's smallest piece of private property.

A restaurant on Staten Island showcases a different grandmother’s cooking every night.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

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

Just your average Marie Antoinette–themed speakeasy in an abandoned 19th-century subway tunnel.

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

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

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

A hands-on traveling collection of the innovative devices of yesteryear.

Elevated freight railway turned wildly successful urban park.

Manhattan’s Battery Park has a whimsical carousel full of spinning, glowing fish.

This beautiful building in the heart of Manhattan's Financial District was empty for decades.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

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

Even for Egyptian royalty, the afterlife was bring-your-own-beef.

Long the exclusive domain of birds and vagabonds, this little-known Central Park peninsula is open to the public once more.

Hidden in Central Park's Ramble is a troublesome cave buried just beneath the surface.

The lesser-known Alice sculpture of Central Park dedicated to the “godmother of American children.”

Once thought to be the fabled Holy Grail, it is now known to be an oil lamp.

A hip bar decorated with walls of golden skulls.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.