This interactive gallery makes you feel like you've stepped into a fantasy world filled with whimsical monsters.

A hidden architectural treasure in New York's Brooklyn.

An arcade packed with a rotating collection of unique independent video games.

The most unloved grain elevator in Brooklyn was a “Magnificent Mistake.”

Underground vaults of a former brewery beneath Brooklyn's Crown Heights are now used to ripen cheese.

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

Phil Mortillaro uses keys to bring art back to the Village.

Check out the underground party scene at the "Burning Man of Brooklyn."

Thriving meadows span a rooftop in one of Brooklyn's most heavily industrialized neighborhoods.

A Victorian cemetery in the heart of Brooklyn remains a popular mecca of morbid curiosity.

A hyper-luxurious, 12,000- square foot home might be buried beneath Queens, still waiting to protect you from nuclear missiles.

The end of the 4 Line is also the end of the line for 300,000 souls in one of NYC's most illustrious cemeteries.

This empty Victorian manse on Staten Island is said to be haunted but is actually a real life crime scene.

A Manhattan courthouse hides a small but scathing memorial to Holocaust injustice.

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

A 19th century hat factory still stands as a crumbling ruin in upstate New York.

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

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

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."

Neon signs that grace the windows of Bergdorf Goodman's and Tiffany & Co. come from this studio in Brooklyn.

From scholastic to sepulchral - now under reconstruction.

Nondescript elevator doors open to reveal a stunning, surreal world.

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

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.