Positioned on a high mound, Clifford’s Tower was built by William the Conqueror in the 11th century, and is nearly all that remains of the old York Castle. Other than an important defensive position, the imposing round structure has been used as a prison and seat of government. Today, the tower is a tranquil spot, and contains interesting information as to the history of the old castle. Climbing stone steps up the narrow staircase concealed within the walls takes you up to the ramparts, from where there are fantastic panoramic views of the city.
