I feel it makes a wonderful day out and you can buy a joint ticket for Alnwick Castle as well ( where part of Harry Potter was filmed). This is the second largest inhabited castle in England and often referred to as the “Windsor of the North” – only 30 miles south from Berwick upon Tweed.
Tip: go early to avoid queues, book ahead to be sure of a table in the treehouse.
Alnwick also has a fantastic second hand bookshop called Barter Books. One of the largest second hand bookshops in Britain