The terrain is mountainous (Miroč mountain) with numerous caves, pits, gorges, depressions, springs (karstic spring of Blederija on Miroč) and lakes. There are several excellent natural scenic viewpoints, like the Veliki štrbac and Mali štrbac on the Miroč, above the Kazan gorge. Panoramic view includes mountains of Deli Jovan and Veliki Krš in Serbia and the Carpathians in Romania. Viewpoint Greben was named by Jovan Žujović as the most beautiful hill in the Balkans at the 1900 Geology congress in Budapest. Another popular feature above the Danube is the hill of Kapetan Mišin breg. The Đerdap is the longest breakthrough type gorge in Europe.