During the holidays, a vintage subway train whisks New Yorkers back in time.

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

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

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

Sniff the Titan Arum's rotting flesh.

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

A celebration of capitalism in Midtown.

The name of this famed hospital was once a byword for the horrors of medical and psychiatric care.

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Read a book next to a Midtown waterfall.

A dilapidated dock tells the story of Titanic's missed arrival.

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

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

Amid the bustle and noise of the Financial District hides a secluded garden oasis above the city streets.

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

A terrific purveyor of natural history objects and curios.

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

The unbelievably opulent home built for an infamous newspaperman.

A garden oasis filled with flowers mentioned in the works of William Shakespeare.

The first AIDS memorial chapel in San Francisco and one of only a few in the U.S.

An elaborate gift from Claus Spreckels is now a piece of San Francisco history.

Early prototype for Frank Lloyd Wright's Guggenheim.

Art from the latest counter-culture; kids who dye their hair blue and believe the future will be a post-apocalyptic water world.