For our optional excursion, we head to the historic city of York. There is plenty to see but first on the list must be the glorious York Minster, the largest Gothic cathedral in northern Europe with world-famous stained-glass windows. Other highlights include the narrow, cobbled streets of the ‘Shambles’ where the buildings date back to medieval times, the Jorvik Centre which tells the story of York’s Viking heritage, and the ancient walls surrounding the city. The famous Betty’s tea rooms are also worth a visit.