Alnwick Castle in the period 1798–1814. The Abbot's Tower houses the Regimental Museum of the Royal Northumberland Fusiliers. An increase in public interest in the castle was generated by its use as a stand-in for the exterior and interior of Hogwarts in the "Harry Potter" films. Its appearance in the films has helped shape the public imagination regarding what castles should look like. Its condition contrasts with the vast majority of castles in the country, which are ruinous and unfit for habitation. The River Aln flows past the north side of the Castle. There is a deep ravine to the south and
Alnwick Castle wall of the bailey. These two main areas of accommodation are connected by a link building. There are towers at regular intervals along the walls of the outer bailey. About a sixth of the bailey wall has been reduced almost to ground level on the bailey side to open up views into the park. Stable and service yards adjoin the castle outside the bailey; these would not have existed when the castle still had a military function. Alnwick Castle has two parks. Immediately to the north of the castle is a relatively small park straddling the River Aln which was