Seven Second Summits 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, () situated some 10 km north of the continental divide, is the highest mountain in Europe. Excluding the Caucasus Mountains, Mont Blanc () would be Europe's highest mountain. 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 the convention of the seven continents, one of the continents is the region of Australasia, which
Volcanic Seven Summits of these cones have a prominence greater than . The volcanoes in the list below all have prominences far exceeding that threshold. "NOTE: Two of the Volcanic Seven Summits, Kilimanjaro and Elbrus, are also members of the Seven Summits. Ojos del Salado is also a member of the Seven Second Summits." Defining the second highest volcanoes on each continent is a bit more complicated, because the continental definitions become critical. The problem between Australia and Oceania: Mount Hagen in Papua New Guinea is certainly the second highest volcano on the Australian continent, but expanding the continental definition to span also