Check out HistoricPlacesLA.org.  It is the first online information and management system specifically created to inventory, map, and help protect the City of Los Angeles’ significant historic resources. It showcases the city’s diversity of historic resources, including architecturally significant buildings and places of social importance, as well as historic districts, bridges, parks, and streetscapes.

Thanks goes to Barry Waite at the City of Carson for pointing out this resource.