Of course, the Danube was never really blue, but it is such a nice title Strauss gave to it! Danube was in Vienna and Budapest too, playing a big role in those capitals. Far from our Transylvania, we did love it from afar mostly.
My mother used to play it on piano to me and when I was child, I used to danse on it. Here is a great interpretation that i found today, a pleasure to listen and to remember old days for me in the same time.