User blog comment:Alfa Wolf/Medieval Fortification Research/@comment-24180511-20120502021104/@comment-24180511-20120502200909

No, Varrock itself isn't one big castle as much as a walled city. The Castle does have walls, though, and the keep is in the castle(the building itself, the inner walls constitute the castle). Technically speaking the only castle that isn't just that, a castle, is in Burthorpe as it's just a keep.