289 Forge Hill Road, Vails Gate. 1754 Ellison House. The HQ for Generals Nathanael Greene, Henry Knox and Horatio Gates. 18th century bridge and ruins of 1741 grist mill. Memorial-Labor Day, Wed.-Sat., 10:00am-5:00pm.; Sun. 1:00-5:00pm. (845) 561-1765 www.nysparks.com