Point Loma Lighthouse, San Diego, California. Built in 1855, The original Point Loma Lighthouse is a historic lighthouse located on the Point Loma peninsula at the mouth of San Diego Bay in San Diego, California. It is situated in the Cabrillo National Monument. It is no longer in operation as a lighthouse but is open to the public as a museum. Don captured the cool sky in this watercolor painting and used a warm light on the building and foreground.