Located on a unique, rugged point North of San Francisco, CA is the Point Bonita Lighthouse.
The original tower and keeper's dwelling, built in 1855, was perched on a ledge approximately 300 feet above the ocean. Its light could be seen from up to 20 miles out to sea, unless heavy fog obscured the beam, and it often did. Almost daily the keepers had to sound the fog signal by firing a cannon mounted outside the tower. Later a 1,500 pound bell replaced the cannon, but the fog and low clouds around the tower remained a problem.
A new light station, pictured, was built at a lower elevation, approximately 100 feet above the ocean. This station included a 33 foot tower, building that housed two steam driven fog signals, storage buildings, and keepers dwelling, The lens from the original lighthouse was moved to the new tower, and in February 1877 the new Point Bonita Lighthouse lamp was lit.
The new tower survived the April 1906 earthquake that devastated nearby San Francisco, but the keeper's dwelling collapsed after the family escaped.
In the early 1980's, the U.S. Coast Guard automated the light and they continue to maintain it. However, the National Park Service maintains the grounds, and to my knowledge, the lighthouse is open to the public three days a week when weather permits.