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

This enormous Hindu temple in Queens serves incredible dosas in its basement canteen.

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

Driftwood dinosaurs lurk within trees covered in a rainbow array of avian abodes.

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

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.

Dodge prohibitionists and slide through the telephone booth in Crif Dogs.

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

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

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

A memorial marks the library lobby where Langston Hughes' ashes are buried.

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

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

One of the only single-person private gravesites in New York City.

This was one of the first (and last) university-built and operated nuclear reactors.

Glacial erratic or man-made dolmen? It probably wasn't druids.

A castle inspired by medieval architecture is hidden in the woods of Connecticut.

This abandoned psychiatric hospital once housed more than 4,000 patients in the middle of a quaint New England town.

This last stalwart of the now-forgotten feminist restaurant movement has been serving food in an activist atmosphere since 1977.

An Escher-inspired library dedicated to the wonders of the human mind, yet closed to the public.

This factory made "health corsets" that were a step towards liberating women's bodies.

Forgotten under the construction of a new urban roadway is a small, abandoned part of town.

The once abandoned ruins of a Victorian beachside amusement park are now back in working order.

The attic and basement house two museums stuffed with oddities like swallowed spoon handles and a shrunken head.