Routes and time planningEdinburgh Castle offers routes of varying lengths. The one-hour route goes through Portcullis Gate, up the Lang Stairs, and then into St. Margaret's Chapel. Then you will continue to the fortifications and to the giant gun Mons Meg. The fortifications offer impressive views of Edinburgh before continuing to the Scottish Crown Jewels as well as the Coronation Stone (Stone of Scone). After these treasures, the Great Hall and the Prisons of War exhibit are visited, as well as another exhibit on the One O'Clock Gun. Longer tours include a visit to Argyle Tower, the Military Prison, the Royal Scots Museum, the Royal Scots Dragoon Guards Museum, the New Barracks, Governor's House (from the outside), and the National War Museum.