Aerial view of Los Angeles showing the Los Angeles River, 1939
Interesting aerial I don't think we've seen before showing the east side of the river and including the massive S&P shops and piggyback yard (and the S&P roundhouse but you've got to really look hard) and Prospect Park. The awnings at the railhead at Union Station can be seen at the left edge but not any of the station buildings.
California Historical Society Collection, 1860-1960