Warkworth Castle crowns a dramatic hilltop above the River Coquet in Northumberland, positioned on a loop of the river less than a mile from England's northeastern coast. Dating from around 1200, this formidable fortress became the favoured residence of the powerful Percy family from the 14th to the 17th centuries, a relationship spanning nearly six centuries. The castle features the distinctive Lion Tower, a Great Hall, and a 15th-century keep, and is prominently mentioned in William Shakespeare's Henry IV, underscoring its historical significance. Adjacent to the castle stands an unusual hermitage carved directly from the cliff rock on the river's banks, accessible only by boat, forming one of the most distinctive pairs of medieval monuments in Britain. Managed by English Heritage and owned by the 12th Duke of Northumberland, Warkworth exemplifies northern England's most formidable medieval defensive architecture.