This abandoned sea fort has become an accidental bird sanctuary.

A priceless collection of the Nation's cryptologic history.

This dig site outside D.C. is known for its exceptionally high density of baby dinosaur fossils and dinosaur eggs.

This fort down the Potomac from Washington, D.C. was once the only defensive fort protecting the capital.

An astounding collection of medical specimens, including bits of President Lincoln.

A Civil War fort in the middle of Washington, D.C. has been swallowed by a forest.

Giftshop catering to cryptozoologists and anyone with a sense of humor.

The house where John Wilkes Booth conspired with his co-conspirators.

This sandwich shop has a century-old elevator behind a sheet of plexiglass.

The world’s largest collection of Tiffany glass sits in a warehouse in Queens.

An easy to overlook storefront hides some of the most authentic and regionally diverse Chinese food in New York.

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

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

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

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