A band of aerialists and circus performers putting on incredible shows in East Williamsburg.

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

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

For over 30 years the walls of this Harlem schoolyard have been a gallery of street art by "Kings and better."

Leaf through over 30,000 artists' sketchbooks in what may be the world's largest collection of doodles

The oldest surviving synagogue in New York City is now a soaring art space.

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

A tunnel once abandoned now thrives with graffiti art as an off-limits makeshift gallery.

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

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

Sniff the Titan Arum's rotting flesh.

A DIY art gallery/music venue/lecture hall dedicated to video game culture.

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

A semi-scholarly approach to sex.

A miniature rainforest is growing inside of a Midtown Manhattan office building.

A New York garbage depot holds a secret collection of weird and wonderful refuse.

Elevated freight railway turned wildly successful urban park.

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

La Monte Young and Marian Zazeela's "Dream House" will immerse you in an ever changing world of sound and light.

Hidden in plain sight on the Hudson River is an abandoned train station where nature has taken over.

Century-old shop, specializing in Occult products.

This Philly landmark has a giant butterfly pavilion, three floors of insect displays, and withstood a $40,000 heist.

Hidden behind West Philadelphia rowhomes is a haven for migratory and local bird species both ordinary and rare.

The abandoned coal loading dock is a canvas for unsanctioned art.