Descend into the Weir in Ossining, explore the original 1842 brick water tunnel and learn its history. You may wish to visit the nearby Sing Sing Kill Greenway – a new walkway under the Aqueduct Arch. Meet at the Weir at the north end of the Double Arch Bridge near the Joseph Caputo Community Center at 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: Sara Kelsey, firstname.lastname@example.org, 646-303-1448.