The Danube is the only river in Europe that flows from West to East. It rises in Germany, crosses four capitals and forms at its inflowing in the Black Sea the only delta in the world declared a biosphere reservation. Delta is the most compact surface covered with reed in the world, hiding more than 320 species of birds and water strands of hosting over 45 varieties of fish.
Also, in the Danube Delta is the only place where one can find sandy forests from Romania, Letea and Caraiman, where vines that reach even 25 meters in length are growing. It is a place that gives you the feeling that you're the first man to reach there.