Keith Haring exhibition at Liverpool Tate is well worth a visit and then you can see the John and Yoko exhibition at the Liverpool Museum too which has many personal artifacts.
If you're looking to try a local beer on Santorini why not try the much advertised Yellow Donkey Ale, although I recommend the Volcan Premium beer instead as it has a hint of lemon with Greek honey to give it a smooth refreshing taste.
Krakow in Poland is currently my favourite city break destination in Europe. Great historical sights, culture and unbelievable food. The weather too. Beats Prague and Budapest! π