Knaresborough Castle is an early 12th century stone keep and courtyard fortress, founded by King Henry I. In the early 13th century, King John remodelled the castle and encased the two baileys, with a curtain wall and a deep outer ditch. In the 14th century, King Edward I and his son modernised and repaired the King's Tower, the great hall, the great chamber, the great chapel, the chapel of St Thomas and the great gate. Sadly only the King's Tower, the East gatehouse and the Courthouse of 1600, survived the Civil War slighting. The castle grounds have been converted to a public park and the northern of two underground sallyports can be accessed. 5 miles south is Spofforth Castle.