5Bannerman Castle, New York, USA
On an island in the Hudson River lies the crumbling shell of Bannerman Castle, built by arms dealer Francis Bannerman VI in the early 1900s. The structure, modeled after European castles, was used to store military surplus. A massive explosion in 1920 damaged the site, and it was eventually abandoned. Surrounded by mystery and inaccessibility, the castle has inspired countless legends—from hidden treasure to ghostly sightings.
