Highest Mountain in the World (and Asia)Everest, Nepal-China: 29,035 feet / 8850 meters
Highest Mountain in AfricaKilimanjaro, Tanzania: 19,340 feet / 5895 meters
Highest Mountain in AntarcticaVinson Massif: 16,066 feet / 4897 meters
Highest Mountain in AustraliaKosciusko: 7310 feet / 2228 meters
Highest Mountain in EuropeElbrus, Russia (Caucasus): 18,510 feet / 5642 meters
Highest Mountain in Western EuropeMont Blanc, France-Italy: 15,771 feet / 4807 meters
Highest Mountain in OceaniaPuncak Jaya, New Guinea: 16,535 feet / 5040 meters
Highest Mountain in North AmericaMcKinley (Denali), Alaska: 20,320 feet / 6194 meters
Highest Mountain in the 48 Contiguous United StatesWhitney, California: 14,494 feet / 4418 meters
Highest Mountain in South AmericaAconcagua, Argentina: 22,834 feet / 6960 meters
Nearly all higher than I have been. I've been to Cusco and Quito, but since I got to both by plane they hardly count as having reached a high altitude. In Scotland, climbing to the top of Cairngorm is the highest I have reached. And worldwide, I guess some climbing near the top of Mount Damavand in the mountains above Teheran would represent the highest I have been above sea level, probably at around 16000 feet.