State Road 35 follows the Danube through Đerdap, Europe's longest gorge, from the nine towers of Golubac to the Roman bridgehead of Kladovo. The road threads the Kazan narrows under the vertical cliffs of the Miroč plateau — the river's narrowest and deepest point — past the Lepenski Vir archaeology site and the relocated Roman Tabula Traiana, then opens into the wide Silver Lake country before Tekija and Kladovo.
The ride starts under the walls of the Golubac fortress where the Danube enters the gorge. South of Dobra the road enters the Great Kazan — the gorge's narrowest section, where the river runs 90 metres deep between vertical limestone walls — with the viewpoints above the water and the memorial plaque of Emperor Traianus set into the rock across from the Romanian shore. Past Donji Milanovac the valley widens into the Miroč highlands country, the cliffs step back, and the last stretch runs through Tekija to Kladovo, where the Danube leaves Serbia. Watch the rockfall warning signs through the gorge — odrones close the road after heavy rain, and AMSS reports access conditions on this section through the year.