The Metropolitan Water District of Southern California manages a library and archival repository documenting the activities of the organization and resources of interest to the greater history of the Los Angeles region. 

The Mojave Desert Archives preserves the history of transcontinental travel to the Los Angeles region through the Mojave Desert of eastern California. Route 66, National Old Trails Road, the Mojave Wagon Road, the Santa Fe Railway (now BNSF), Union Pacific Railroad, and Interstate highways were and are major transit routes through the desert terminating in the Los Angeles basin.

Rancho Los Cerritos is an historic home and gardens located in Long Beach, California. While the history of the land dates back many centuries, the house itself was built to be the headquarters of a 27,000 acre cattle ranch in 1844 by Los Angeles resident John Temple. The ranch evolved during the 175 years since its construction, its ownership and land use changing several times before becoming a…