danube in djerdap national park, serbia

ancient autumn balkan beauty blue border canyon carpathian cliff cliffs climbing cloud colors danube depth destination djerdap dusk east ecology environment europe flow forest gate glow golden gorge green height high hiking hill iron kazan landmark landscape majestic miroc mountain national natural nature outdoor over park ravines river riverbank rock rocky romania scenery scenic serbia sky stone strbac summer sunny sunset the tourism travel trees valley viewpoint water