Tower of Hercules (A Coruña, Spain)

Ever since the second century AD, the Tower of Hercules has imperiously watched out over Spain’s North Atlantic coastline. This remarkably makes it the oldest lighthouse still in use today. Such is its age that it is believed to have been modelled after the Lighthouse of Alexandria. Located in A Coruña, Spain, it's a UNESCO World Heritage site and continues to guide ships along the North Atlantic coastline.