The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

This derelict superstructure was a very important warning system for the Soviet military.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

An enormous, inside-out glass globe built in 1935.

World's first "penitentiary," meant to be humane, drove men insane.

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

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

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

New York's oldest magic store.

This float factory takes the mask off of Mardi Gras and lets visitors see where the magic happens.

New York's southernmost subway station is whimsically wavy.

An abandoned warehouse turned art sanctuary in New Orleans.

A New York warehouse filled with an enormous amount of goods saved from the landfills and donated for creative use.

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

A huge resale shop for the cast-offs of the film & television industry.

A forgotten relic from New York's bygone trolley system hides in plain sight under a bridge.

An Industrial Revolution-era public work that purified water using nothing but sand.

The fanciest public restroom in New York City boasts fresh flowers, art, and a classical music soundtrack.

A layered tribute to the work of mosaicist Isaiah Zagar.

America's greatest forgotten garden and the former stomping grounds of Son of Sam.

The remnants of two World's Fairs are here, complete with a 12-story globe, a mini-Manhattan, and a UFO-shaped pavilion.

Read between the lines of the subway map to find the hidden abandoned Civil War fort.

The floor-to-ceiling collection in an old factory is a unique alternative to stuffy galleries.

A staggering collection of photographs depicting medical, social, and historical change.