Real estate development profoundly changes the land–water, plants, soil, animals, and even weather. What was the environment like here, a century or more ago? Some related posts:

• A Park for Sunnyside
• Farmland to Freeway: a history of Rock Ranch
• Cows in Sunnyside?
• From Tennis to Housing: the Story of the Gennessee Courts
• The Creek that Ran through Sunnyside
• A Savior on a Rocky Knoll [Dorothy Erskine Park]
• The Ballad of Ellen Furey the old dairywoman of Sunnyside
• Farms in Sunnyside?
• The History of the Balboa Reservoir
• Open space interlude (The History of the Balboa Reservoir)
• The real estate picture: 1909: ‘Facts about Sunnyside’