For your protection and the protection of others, please use gloves and/or hand sanitizer before and after handling each cache.
This Cache is placed as part of the 2021 Taconic Region Geocaching Challenge. Please see
HH1 for more information. This cache contains a unique stamp which must stay with the cache. Use this stamp to mark your passport. This stamp is NOT a trade item.
Francis Bannerman VI, the castle's eponym, was born on March 24, 1851, in Northern Ireland. The family moved to Brooklyn in 1858 and began a military surplus business near the Brooklyn Navy Yard in 1865 purchasing surplus military equipment at the close of the American Civil War. In the spring of 1901 he began to build an arsenal on Pollepel Island. 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.