The Old Croton Aqueduct, New York City's original water supply, carried water 41 miles by gravity from Croton-on-Hudson into the Bronx and Manhattan, passing through Sleepy Hollow and Tarrytown. Now a National Historic Landmark, the aqueduct is a horseshoe-shaped brick tunnel 8.5 feet high by 7.5 feet wide. Don't miss this rare chance to enter …
