Francisco Heights was a 1930s public housing project that never was. Imagine 11 buildings for 2500 residents near present-day USF. (Outside Lands San Francisco Podcast Dec 7, 2019)
From 1955 to 1966 a futuristic aerial cable car traversed Sutro Baths' cove from the Cliff House to Point Lobos. From all accounts, it wasn't as fun as it sounds. (Outside Lands San Francisco Podcast Feb 14, 2013)