panorama of the danube river near the serbian city of banatska palanka in iron gates, also known as djerdap, which are the danube

djerdap danube serbia iron gates sunset dusk bazias banatska palanka hills nature hill moutain landscape srbija romania panorama gorge park national river vertical border green background travel outdoor rocky high sunny scenic mountain canyon beautiful panoramic blue gate environment serbian romanian tourism landmark symbol natural donji milanovac portile din fier city fier river forms