Drop in on a joyous 175th birthday party for the Old Croton Aqueduct at the Keeper’s House Visitor & Education Center in Dobbs Ferry, 15 Walnut Street, Dobbs Ferry, NY 10522. Music! A new photo exhibit of the OCA trail by photographer Fred Charles! Hands-on activities for the kids! “Croton Cocktails” (lemonade), birthday cake and snacks! Inquiries: Joanna Riesman, email@example.com or Mavis Cain, firstname.lastname@example.org or 914-693-0529.