The northwestern Carpathians begin in Slovakia and southern Poland. They surround Transcarpathia and Transylvania in a large semicircle, sweeping towards the southeast, and end on the Danube near Orşova in Romania. The total length of the Carpathians is over and the mountain chain's width varies between . The highest altitudes of the Carpathians occur where they are widest. The system attains its greatest breadth in the Transylvanian plateau and in the southern Tatra Mountains group – the highest range, in which Gerlachovský štít in Slovakia is the highest peak at above sea level. The Carpathians cover an area of , and after the Alps, form the next-most extensive mountain system in Europe.