Geysers Geothermal Complex, world's largest

"In the Mayacamas Mountains, located north of San Francisco, naturally occurring steam field reservoirs below the earth's surface are being harnessed by Calpine to make clean, green, renewable energy for homes and businesses across Northern California. The Geysers, comprising 45 square miles along the Sonoma and Lake County border, is the largest complex of geothermal power plants in the world . . . The Geysers meets the typical power needs of Sonoma, Lake and Mendocino counties, as well a portion of the power needs of Marin and Napa counties. In fact, The Geysers in 2018 provided 50 percent of California's geothermal generation." The turbines can generate up to 725 megawatts of electricity, which is enough to power a city the size of San Francisco.