One of the ultimate mountaineering challenges, the Seven Summits complies of the highest mountains from each of the seven continents. My other challenge included summiting Lhotse, the fourth highest in the world, within 24 hours of Everest, but bad weather unfortunately prevented this from being possible.
There are actually eight listed here, as there are two different lists for the summits. The Bass list is the original, and is the one that my dad and myself will be attempting. This list counts Mt Kosciusko as the tallest peak in the Australasia continent. The alternative Messner list includes Carstensz Pyramid, in Indonesia, instead.