Nothing like backpaking through Europe, i ddi it with my brother last summer great stuff we took the train tho. What transport are you going to use?
Well i didnt have my Nikon back then, but it sure would ahve placed really good in my hicking backpack its about the size of my back, and has a lill "top" cabinet so to speak which is about the size of d40x!
Places to check out if your going by train:
-All those lovly towns by the ocean
-You have to check out the champagne region its beatiful!
England (even thos its a big side track from rest of europe)
We didnt go here, me and my brother focused more on the "main part" of the EU
-Brussels (its just lovley if you ask me)
-Berlin (i think most of the german cities look alike but Berlin covers most of them
where i live there sint anything to se really
-Budapest been there servral times can give u some tips if you want
-Prague, an amazing city been there twice
I mean those where the places that we whent to, but of course stopping along the way and checking out some smaller placeses
But if you specifly need any tips on Madrid/Granada/Budapest/Copenhagen i will more then glad to share them with ou as i m very familiar with those places!