Dún Laoghaire is a coastal town located in County Dublin, Ireland. It is known for its picturesque harbor, which is one of the largest in Europe, and serves as a popular spot for sailing and other water activities. The town has a rich history, with its origins dating back to the 19th century when it became a significant port for trade and passenger travel. The town features a variety of amenities, including shops, restaurants, and parks, making it a vibrant community. Dún Laoghaire is also home to several cultural attractions, such as the Dún Laoghaire-Rathdown County Hall and the National Maritime Museum of Ireland, which celebrate its maritime heritage.