Regnéville-sur-Mer is a charming coastal town located in the Manche department of the Lower Normandy region in France. Situated on the western coast of the Cotentin Peninsula, the town is known for its picturesque harbor, historic architecture, and beautiful sandy beaches. The town's medieval castle, Château de Regnéville, is a prominent landmark and a popular tourist attraction. The castle, which dates back to the 12th century, offers visitors a glimpse into the town's rich history and heritage. The surrounding cobblestone streets and quaint houses add to the town's old-world charm.