California, Almaden Valley attracted a significant amount of settlers from the East Coast and Europe. In 1852, Charles LeFranc founded Almaden Vineyards, the first commercial winery in California, with his father-in-law Éthienne Thée, using vine cuttings from his native France. Following Prohibition, the winery and the company had great success with their blush wine and the White Grenache Rosé, one of the first popular pink wines in the United States. Almaden Vineyards has since moved its winery to Madera, California, while the historic remains of the property are now known as the Old Almaden Winery, which serves as a public park and California Historic Landmark. Beginning in the late 1800s, Almaden was home to the Graystone Quarry (originally the Goodrich Quarry), one of the most significant quarries in the Bay Area, used in the construction of landmarks including San Francisco City Hall, Stanford University, Cathedral Basilica of St. Joseph, among numerous others. Today, the area where Graystone Quarry once existed and where the Pfeiffer family once lived is occupied by the neighborhood of Pfeiffer, also known as, the Graystone of Almaden, thus named after the quarry's stone master Jacob Pfeiffer and the Quarry 20th century In December 1959, the Regents of the University of California selected Almaden Valley to be the site of the next campus of the University of California system. Unfortunately, news of this decision caused property values in the area to increase so rapidly that the Regents could no longer afford to buy the needed land. After another year of study, the Regents selected another site much farther south, which opened in 1965 as the University of California, Santa Cruz. In 1968, Calero County Park was established around Calero Lake in the Calero area of southern Almaden. Calero Lake was created in 1935, when Arroyo Calero was damned. In 1975, the New Almaden mines closed after 135 years of operation. Santa Clara County Parks subsequently purchased the vast property surrounding the mines, in order to transform it into a regional park. Almaden Quicksilver County Park opened a few years later after an extensive clean-up of the area. It is declared a National Historic Landmark and a California Historical Landmark. Geography The neighborhood is southeast of Los Gatos, southwest of the Blossom Valley, and west of the Santa Teresa. The Santa Teresa Hills are to Almaden's east, separating it from Santa Teresa, and the Capitancillos Hills of the