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

Commemorating the spot where the famous scientist fed his pigeons.

A mysterious air force base built to resemble a Long Island fishing village.

A mass grave for victims of one of the city’s worst fires.

A curious friendship between two inanimate ladies.

An eccentric playboy's astounding natural history collection.

Beneath the mossy overgrowth covering this once-sprawling campus lies decades of history and the secrets that come with it.