you can head for nantes in brittany, which every year, hosts a huge citywide art trail. it's 30 stages, taking the big attractions at the jules verne—inspired machines de l'ile theme park. you have to pay to ride the great elephant — or sea world carousel. but many other sites on the route are free. the beach town of boulogne is home to europe's biggest aquarium. and it's vast. there are about 1,600 species at nausicaa and the main tank's so big it takes about six weeks to fill. there are rotating exhibitions. right now, augmented reality allows you to experience what life is like for creatures in the open seas. still to come on today's show — the canadian port that likes to blow its own horn. horns honking