Portuguese explorer Juan Rodríguez Cabrillo discovers Catalina Island off the coast of California.
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The first Legoland outside of Europe opened in Carlsbad, California.
The world's largest plane, The Stratolaunch, had its first flight from the Mojave Desert in California.
A 5.6 magnitude earthquake dubbed the 'Sierra Madre Earthquake' occurred in South California and caused around $40 million in damages.
The Disneyland Monorail System opened to the public in Anaheim, California.
California's first freeway, Arroyo Seco Parkway, officially opened to traffic.
