The brick structure for the Lime Point Lighthouse was built in 1883 as a fog-bell signaling station. It was eventually fitted with coal powered 12-inch steam whistles. During operation, the facility included the fog signal building, a coal shed, water tank, and a two-story keeper's quarters. The keepers building later upgraded to include a third floor. Only the fog signal building is left today. The shadows are made by the Golden Gate bridge.