//
Go hiking or biking on the aqueduct's trailway. The original water supply to New York City is now a walking trail that runs from Croton-on-Hudson in the north to Yonkers in the south. Over the 180 years since it was built, portions have disappeared from the downtown areas of other river towns, but remains mostly intact in Dobbs Ferry. Cary's Pharmacy at 105 Main St., +1 914 693-0008, sells maps of the trail. When the aqueduct was in service, it was monitored by a series of overseers. The last of the overseer's houses, dubbed the Keeper's House, still stands beside the trail in Dobbs Ferry.