Book excerpt: San Francisco's "opposite shore" is showcased for its maritime role in securing the city's financial preeminence. Located minutes from San Francisco by ferry or automobile, Contra Costa County provided deepwater ports for shipping agricultural, mineral, and manufactured goods around the world. Pacific commodity traders made use of these ports to ship products, ensuring California's unique global economic role. Immense wealth was created from goods shipped from maritime Contra Costa County, securing a vibrant economy from the Gaslight Era to the days of Haight-Ashbury.