Here's why Bannerman Castle is one of the best day trips from NYC
Linked to the Big Apple via Metro-North's Hudson Line all year long — that and a boat shuttle departing the docks near the Beacon train station — Bannerman Castle is the focal point of life on little Pollepel Island, a strategic site during the Revolutionary War that later became a munitions depot for a military surplus dealer based in Brooklyn, named Francis Bannerman.
Source: nypost.com