The stunning panoramic views over Old York from the top of Clifford's Tower, make it the ideal starting point for any visit to the city. There's plenty to discover at this imposing tower standing proud on its high mound. It is almost all that remains of York Castle built by William the Conqueror, and has served as a prison and a royal mint in its time. Clifford's Tower stands as a proud symbol of the power of England's medieval kings. Originally built by William the Conqueror to subdue the rebels of the north, it was twice burned to the ground, before being rebuilt by Henry III in the 13th century. The tower takes its name from one grisly incident in its long history, when Roger de Clifford was executed for treason against Edward II and hanged in chains from the tower walls. With sweeping panoramic views of York and the surrounding countryside, it isn't hard to see why Clifford's Tower played such a crucial role in the control of northern England.