Clifford's Tower is the largest surviving structure from the medieval royal castle of York. One of English Heritage's most visited buildings, the Tower offers superb views over the city, but has stood as a roofless ruin since a fire in 1684. To address the shortfalls in visitor experience, a timber structure has been installed to partially cover and protect the ruin and provide fantastic viewing and activity space at roof level. Suspended metal walkways give access to previously unseen features and the historic fabric has been carefully cleaned and conserved.