Lighthouse

A lighthouse is a tall structure with a bright light at the top, located on or near the coast, to serve as a navigational aid for ships at sea. Lighthouses help sailors and mariners to safely navigate through waters, especially in low visibility conditions or at night. The light emitted by a lighthouse can be a steady beam, a flashing light, or a rotating beacon, and each lighthouse has a unique light signature to help distinguish it from other nearby navigational aids.