The 1848 discovery of gold in the hills of California brought prospectors and adventurers west; many came across the country on the treacherous western trails, while others came by sea. The rugged coast of California and the dangers of the San Francisco Bay waters claimed many ships and their passengers. The loss of these ships and the ever-increasing number of vessels converging in the San Francisco Bay made it evident that navigational aids were desperately needed. To enhance maritime safety in the region, the San Francisco Bay's first light, located on Alcatraz Island, began construction in 1852. Light stations soon followed at Fort Point, Point Bonita, and the Farallon Islands. An additional 15 lights later served the bay, and two lightships were stationed outside the Golden Gate.