thresheld

First of all, thank you to everyone that's been helping me on my journey so far! I really appreciate it.

So... my uncle has offered to help with funding for my trip, as long I give him a list of education-related expenses. I'm planning on visiting just about all the museums I can, in all of the places we visit, with perhaps the exception of Germany.
So to recap my destinations: London, Amsterdam, Paris (and probably other cities in France, I'm not terribly sure), Italy (Not sure which cities), Germany, The Greek Islands, and back to London, probably.
What museums should I visit and how much do they cost? (This is a rather big question, and if nobody has answers I understand!)
I don't even know if I'm asking the right questions. Ack!
*starts getting anxious*