An underwater road considered a possible Atlantis location.

The pits used to load the nuclear bombs onto the aircraft that dropped them over Hiroshima and Nagasaki at the end of World War II.

A sobering scientific reminder of the human damage caused by the advent of the nuclear age.

An eerie reminder to the horrors of World War II.

A plaque marks the site directly below the mid-air detonation of the atomic bomb over Hiroshima.

There’s a secret bunker inside the Brooklyn Bridge, but the city won’t say where.

An atomic bomb-proof strongbox protects the U.S. Constitution from terrorists and thieves.

One of the Cemestos prefab homes built to secretly house thousands of Manhattan Project workers.

A cannon designed to fire an atomic warhead.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

One of the last Jazz Age "Wonder Theaters" in New York City.

This abandoned caretaker's apartment is one of 13 left in the New York Public Library system.

Final resting place of Typhoid Mary.

Home to the Titanic Historical Society's collection.

Decades after testing the polio vaccine on unwitting patients, this historic mental hospital sits in ruin.

The graves of a Connecticut family thought to have been plagued by a vampire.

This small-town pizzeria won the Hollywood lottery.

Collapsing castle on the Hudson river was once the storage site of military surplus business.

This abandoned cemetery is crumbling into ruin, exposing the artifacts and bodies buried there.

The abandoned husk of a mental institution that failed to save a Jazz Age icon still sits nearly unchanged.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

The US Navy's only submarine museum is also home to the world's first nuclear submarine.

One of the earliest graveyards in the region.

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