in General The world’s oldest existing lighthouse is the Tower of Hercules, in Spain by Web Desk July 24, 2016, 6:48 pm 361 Views The world’s oldest existing lighthouse is the Tower of Hercules, in Spain, erected in the first century and still operational. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website By using this form you agree with the storage and handling of your data by this website. *