The fourth segment of our tour of the Transantarctic Mountains boasts the most spectacular scenery and the southernmost outcropping of rock on the planet.
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The central Transantarctic Mountains are a polar fastness of superlatives.
Standing 45 miles out from the mountain front across McMurdo Sound, Ross Island boasts the world's southern most active volcano, Mt. Erebus, with a continuously convecting lava lake at its summit.
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