Northumberland is a county located in the northeast of England, known for its stunning landscapes and rich history. It features the rugged coastline along the North Sea and the picturesque Northumberland National Park, which is home to the famous Hadrian's Wall, a UNESCO World Heritage Site built by the Romans. The county is also famous for its historic castles, including Alnwick Castle and Warkworth Castle, which attract many visitors. Northumberland's charming towns, such as Hexham and Berwick-upon-Tweed, offer a glimpse into its cultural heritage, making it a popular destination for tourists seeking both natural beauty and historical significance.