Came across some pics of long gone San Francisco amusement parks dating back to the 1800s. Second link is specific to Playland at The Beach, owned by the Whitney brothers. George Whitney was the only early Imagineer to have any park experience and was DL's Director of Ride Operations until 1958.
Celebrate Summer with San Francisco's Lost Amusement Parks - Summer Flashback - Curbed SF
Playland - FoundSF