Seven Third Summits Sumantri () and Ngga Pulu (). The definition of "continent" is a matter of some dispute among mountaineers seeking to complete this challenge. The main ridge of the Greater Caucasus range is generally considered to form the boundary between Europe and Asia. In that case, Mount Elbrus () and Dykh-Tau (), are the two highest mountains in Europe. Excluding the Caucasus Mountains, Mont Blanc () and Monte Rosa () would be Europe's two highest mountains. The Australian continent is defined as comprising the mainland of Australia and proximate islands on the same continental shelf, including Tasmania and New Guinea. In
Mount Elbrus the summit. Beside the "Barrels", there are several container accommodations between about 3,800 and 4,200 metres. The Terskol Observatory, an astronomical observatory with the IAU code B18, is located 2.5 km north-west of Terskol village at an altitude of . The "Normal Route" is the easiest, safest and fastest on account of the cable car and chairlift system which operates from about 9 a.m. till 3 p.m. Starting for the summit at about 2 a.m. from the Diesel Hut or Leaprus mountain hut should allow just enough time to get back down to the chairlift if movement is efficient. A