Portsmouth is a coastal city located in the county of Hampshire, England. It sits on Portsea Island, which is separated from mainland England by a narrow stretch of water called the Solent. Portsmouth is known for its long naval history and is home to the world's oldest dry dock which dates back to the 15th century. The city has a population of around 238,000 people and is a significant port for both commercial and military purposes. It is also famous for its historic dockyard, which houses famous ships such as HMS Victory and the Mary Rose. Portsmouth has a thriving cultural scene, with many museums, galleries, and theaters, as well as numerous shopping and dining options. The city is easily accessible by train and ferry, and it also has an international airport.