Knaresborough is a small, old-fashioned market town a few miles from Harrogate (about ten minutes on the train). It is fairly hilly and probably not ideally suited to someone with less good mobility. The castle ruin sits just off the main town square and is, frankly, not a great deal to see, but it commands a fantastic view of the river Nidd below and of the famous viaduct across which the train passes coming and going from the local station. The day we were there, the weather was a bit dour - misty and very damp - but we still enjoyed a walk around the town (you can see pretty much the whole place in a couple of hours of gentle strolling), which is in need of a bit of care and attention, but not without its charm. Probably much better in spring and summer, but a worthwhile place for a short visit - especially for that view from the castle.