Bannerman Castle, New York

Bannerman Castle locate on Pollepel Island 6.5 acres, (2.6 ha) in the Hudson River, 50 miles from New York. It’s abandoned military surplus warehouse. General George Washington signed a plan to use the island as a military prison; however, there is no evidence that a prison was ever built there. Bannerman purchased the island in November 1900 for use as a storage facility, because his storeroom in New York City was not large enough to provide a safe location of thirty million surplus munitions cartridges.
In the spring of 1901 he began to build an arsenal on Pollepel. Bannerman designed the buildings himself. Most of the building was devoted to the stores of army surplus. Bannerman built another castle in a smaller scale on top of the island near the main structure as a residence, using items from his surplus collection for decorative touches. Construction ceased at Bannerman's death in 1918. In August 1920, 200 pounds of shells and powder exploded in an ancillary structure, destroying a portion of the complex.