Meet at the Joseph Caputo Community Center & take a short walk to the Weir on the Double Arch Bridge. There you will descend into the original 1842 brick water tunnel and learn its history supplying water to a thirsty New York City. There is an optional (self-led) walk along the Sing Sing Kill Greenway, located below the Double Arch Bridge, after the Weir Tour. Address: 95 Broadway, Ossining, NY 10562, just west of Rte. 9/Highland Ave. at the junction of Croton Ave. (Rte. 133) (from Metro-North Ossining Train Station by taxi or 15-minute uphill walk). Inquiries: Peter Dispensa, email@example.com or 914-522-5000.