The Rancho San Pedro is the site of the First Spanish land grant in California. The land was granted in 1784 by King Carlos III to Juan Jose Dominguez, a retired Spanish soldier who came to California with the Portola expedition and later with Father Juniperro Serra. The original land grant encompassed 75,000 acres, including the entire Los Angeles harbor. The land has passed through successive generations and remains in the Dominguez family. Today, the descendants operate the Watson Land Company and the Carson Estates Company on the original Rancho land.