Meet at the Joseph Caputo Community Center & view a short film about the Aqueduct. The Weir is nearby on the Double Arch Bridge. There you will descend into the original 1842 brick water tunnel and learn its history. There is an optional 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 Hudson Line Ossining Train Station by taxi or 15-minute uphill walk). Free and no reservation required. Inquiries: Jean Horkans, firstname.lastname@example.org or 914-762-4082.