Boulogne-sur-Mer is without a doubt one of the pearls of the French Opal Coast. With its rich history, picturesque streets and beautiful historic buildings, this port city is an absolute must to visit!Boulogne-sur-Mer is only an hour\'s drive from De Panne, the last Belgian coastal city just before the French border. When you enter Boulogne-sur-Mer you get an instant holiday feeling, thanks to the beautiful view of the beach and the harbor. This diverse city has something for everyone: nature, culture and sports ... It is impossible to be bored here!The pièce de résistance of Boulogne-sur-Mer is without a doubt Nausicaá, the largest aquarium in Europe. Sharks, giant manta rays, sea lions ... At Nausicaá you will find them all! You can easily walk around for a day here and marvel at the beautiful fish in the spectacular aquariums, learn about the wonderful underwater world and even help feed the fish in the lagoon! In short, Nausicaá is the ideal indoor activity for young and old.But of course Boulogne-sur-Mer has much more to offer. This northern French city has a beautiful, historic downtown that is certainly worth a visit thanks to its cozy streets, charming restaurants and traditional fish market. But the Basilique Notre-Dame with its beautiful frescoes and impressive dome is certainly not to be missing from the list. The real crowd puller is indeed the crypt of the basilica, a maze of galleries and corridors with numerous religious artifacts and historical remains. Boulogne-sur-Mer is and will of course remain a coastal city, so you can also go here for long beach walks and water sports. But the favorite sport of the Boulonnais, of course, remains sailing a sail truck, also known as beach sailing.