Drave Kushka Inntal Iller Didessa border Kionga Pechory IJzer Segestan Zeravshan Neretva potok valley Ipoly Sutorina Strymonas Bangalah Bohinjka Aterno Mesolcina Dnister lands Wakhan Vjetrenica gyep Danube Khagrachari Stanovoy Elbe Dyje Darya Skydra Dniester Morava Yotvingian