The generally accepted highest summit in Europe is Mount Elbrus () in the Caucasus, appearing on both the Bass and Messner lists. However, because the location of the boundary between Asia and Europe is not universally agreed upon, its inclusion in Europe is disputed: if the Kuma-Manych Depression is used as the geological border between Asia and Europe, the Caucasus and Elbrus lie wholly in Asia. If the Greater Caucasus watershed is used instead, Elbrus' peaks are wholly in Europe, albeit close to the border with Asia. Mont Blanc (), lying on the border between France and Italy in the Graian Alps, is seen by some to be the highest mountain in Europe.