New York City's only wildlife rehabilitation center treats more than 3,000 feathered and furry patients each year.

A collection of fanzines, recordings, and documents detailing the rise and influence of the feminist punk movement.

Long-forgotten artifacts give incredible insight into New York's most glamorous hotel.

This castle-like building in Manhattan helped destigmatize cancer in the 19th century.

A simple midtown bar was once the home of a secretive and exclusive club staffed by "bunnies" under Hefner's strict rules.

This narrow shop in the East Village hosts a matchmaking service for the new millennium.

This New York holdover was built to provide housing for shopgirls and still does not allow men above the lobby.

One of the last full-orchestra recording studios in New York City and an acoustical marvel.

A famous songsmith's custom piano, dubbed "High Society," is hidden just out of sight in one of New York's finest hotels.

What happens here stays here – unless it affects the whole world.

Down a stairway in the East Village, you could once read a plaque describing an alternate history of a fictional version of Manhattan.

One of the few remaining American elm trees in New York’s Tompkins Square Park was the birthplace of a new religion.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

Discover the taste of mold.

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 partially hidden wall graffitied by spectators of the 1976 Bicentennial, recently rediscovered.

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.

Make a tough dinner decision: Octopus wasabi roulette or bull penis?

This abandoned subway station can still be seen on regular commuter trips.

One of the last Jazz Age "Wonder Theaters" in New York City.

An uber-secure, windowless tower of doom in the center of Manhattan is an NSA spyscraper.

This ruined fort hidden at the top of Central Park can't seem to keep from losing its historical plaques.

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

From scholastic to sepulchral - now under reconstruction.