At Cape Neddick Light Station, a booming bell warned mariners of the "savage rocks" surrounding the tip of Cape Neddick. The bell hung from a pyramid-shaped structure attached to the tower and was operated by a clock-like mechanism. Activated during periods of low visibility, its sound could be heard more than a mile at sea. After serving for almost a century, the bell was replaced by a power-operated fog horn. The light station was constructed in 1879 and automated in 1987.