Series of storm drains connected to a dark urban legend.

Final resting place of Typhoid Mary.

The famous author's cottage hideaway.

The haunting, dilapidated remains of a former poorhouse on Staten Island's Greenbelt.

The feral felines of Roosevelt Island have a small army of allies and an abandoned hospital all to themselves.

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

Feral cats keeping the rodent population at bay all across Greenpoint waterfront.

New York's oldest magic store.

A charming "tea atelier" hidden away in Greenpoint, Brooklyn.

A semi-scholarly approach to sex.

A Pythagorean funhouse that tries, successfully, to prove that math is the coolest thing ever.

The site of the deadly Triangle Shirtwaist Factory Fire.

A tiny islet just off Long Island offers a wealth of infectious curiosities.

Reverend Jen's unique museum/living room showcases her troll collection.

Walk over a 150 year old manhole.

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

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

Visit the site of a subway powered by nothing more than air--and lots of it.

Deep under Manhattan is the largest construction project in city history. So far, the project has taken the lives of 23 workers, or "a man a mile."

A terrific purveyor of natural history objects and curios.

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