Holiday in Europe????

I would recommend Greece I have been there before and it is beautiful. You are going for a long time so what I would do is map out the places that are closest and just take it from there. I take it that your finances are great so just start labeling the places you would like to go and start searching for deals for the rooms in different countries. This will be a cool experience I hope I was some help to you need any more help just ask me.