This is an official New York State park on Pollepel Island. Originally the island was used to store munitions that were sold by Francis Bannerman. Started construction in 1901 and stopped in 1918. In 1920 an explosion damaged the building.
Tours are from Early May to Late October
You can get there by passenger boat for $35 each by calling 855-256-4007 or via kayak tours from $60 to $100 each at http://www.stormkingadventuretours.com/kayak.php#bic
