Take a leisurely drive north up the coast from Newcastle upon Tyne to explore the wild and windswept shores of Northumberland County on the way to the town of Alnwick. During the summer months, you can visit Alnwick Castle, one of the oldest inhabited castles in England, where the Duke of Northumberland resides. The town is also famous for Alnwick Garden, home to floral exhibits like the ornamental garden with its intricately planted patterns, and a poison garden, with beautiful but deadly plants like hemlock and belladonna.