Boulogne-sur-Mer is a charming city located on the Opal Coast in the Nord-Pas-de-Calais region of France. Situated just 30 kilometers south of Calais, it is a popular destination for both locals and tourists alike. The city is known for its rich history, dating back to Roman times. It is home to the impressive Basilica of Notre-Dame, a stunning example of Gothic architecture that dominates the city's skyline. The old town, with its narrow streets and picturesque buildings, is a delight to explore, offering a glimpse into the city's medieval past.