The High Bridge is New York City’s oldest Standing Bridge. It connects Manhattan and the Bronx and is accessible from both boroughs. The High Bridge was built in the mid-19th century as part of the Croton Aqueduct system, which carried water from the Croton River in Westchester down to Manhattan. When you cross the bridge, you will be walking above the aqueduct’s original pipe, which still lies beneath the walkway of the bridge.

Source: NYC Parks