Four-thousanders are the highest mountains and summits in Europe and are all found in the Alps. There is no agreement over where the boundary is between Europe and Asia which is why there is a dispute over which continent the over 5,000 metres high Caucasus range is in. In the Alps the highest four-thousander is Mont Blanc at 4,810 metres, the lowest, at exactly 4,000 metres is the eastern summit of Les Droites.