Sutro's Cliff House pool.
Adolph Heinrich Joseph Sutro
Sutro Tunnel
Born to a Jewish family[1] in Aachen, Rhine Province, Prussia (today North Rhine-Westphalia, Germany), Sutro, educated as an engineer, arrived in the United States at age 20. In 1860, he introduced himself to William Ralston of the Bank of California and introduced his plans for de-watering and de-gassing the mine shafts of the Comstock Lode by driving a tunnel through Mount Davidson to drain the water. Sutro incorporated the Sutro Tunnel company and raised US$3 million, a considerable fortune through this work in Nevada.[2] He included the miners in his scheme, and planned to sail to Europe to negotiate with the Parisian Bank, but the Franco-Prussian War commenced in the middle of July 1870. Sutro was stymied, but out of the blue came an offer from a London bank led by a banker named McClamont, who offered $750,000 in gold per year for the Comstock
https://en.wikipedia.org/wiki/Adolph_Sutro