View of a bridge in the park. Photograph is stamped on the back: "This is the property of Raymond Moriyama, Architect." E. T. Seton Park is located in the Central Don area of the West Don River valley, south of Eglinton Avenue East. The parkland was acquired from the Flemingdon Development Corporation in the 1960's for the Metropolitan Toronto Zoo, which was eventually built in the Rouge Valley. Beginning July 1, 1965, the Province of Ontario leased the north-east corner of the park from the former Metropolitan Toronto for ninety-nine years to operate the Ontario Science Centre.