Edinburgh is an absolute must and yes I'm being bias but you can't beat it for history. Every street corner has a story to tell and there are so many beautiful old buildings and we even have our own Pandas now
Mary Kings Close
Princes Street Gardens
You can even take a journey out to Loch Lomond or wlak up Ben Nevis which isn't that far and the scenery is stunning.
[ Edit: Edited on 12-Jul-2013, at 10:35 by calcio82 ]
Italy: Florence, Pisa, and Rome
Austria: Vienna and Linz
Germany: Hamburg, Berlin, München, Frankfurt Main,
England: London, Canterbury, Exeter, Arundel, Avebury, Bath
Scotland: Lochs, Highlands
Hah sorry the post was very generic; should have specified more but thank you everyone for all the replies! Will look more into the cities that were suggested; I'm from England though and travelled all over it - never gave Scotland a second thought for some reason, so could be nice. I really like the look of Florence and the Ukraine-Poland area does look fantastic!
My friend is REALLY into aviation and planes - anyone know good places for that? He loved the Flight Museum in Munich for example.
Lots to look at but thanks again everyone!