World’s oldest existing lighthouse

The world’s oldest existing lighthouse is the Tower of Hercules in Spain, erected in the first century and still operational. A UNESCO World Heritage Site, it now marks the entrance of Spain’s La Coruña Harbour. This ancient Roman lighthouse is 180 feet tall and overlooks the North Atlantic coast of Spain. At its base is preserved the cornerstone with an inscription crediting it to the architect Gaius Sevius Lupus from Aeminium (present-day Coimbra, Portugal).