3. Old Croton Aqueduct Gatehouses

The Croton Aqueduct gatehouses provided access to the aqueduct for maintenance and regulation of water flow. There are three gatehouses on the Upper West Side along Amsterdam Avenue at 113th, 119th, and 135th Streets. The one above is just by Columbia University on 119th Street, the ones below at 113th and 135th Street, at City College:

Croton aqueduct pump house-113th Street-Columbia University

croton aqueduct gatehouse ccny city college