Let's see your favorite explorers on the world's currency, lots of Columbus, Henry the Navigator, Marco Polo, and the like out there.
This is Australia's $100 bill from 1985, these come with four signature varieties, and is well worth tucking away. The front shows Australian Polar Explorer, Sir Douglas Mawson, in his wool Balaclava helmet in Antarctica. The background are renditions of mountain ranges in geologic stratigraphy outline. His first expedition to Antarctica was with the Shackleton Expedition of 1907-1909 as a geologist, where he was one of the first to climb Mt. Erebus and also reached the South Pole. His next expedition in 1911 was beset by harsh weather and calamity, he trekked the last 100 miles to the coast and rescue all by himself, thereby saving his exhausted men in the interior.
The back features John Tebbutt, an early Australian settler and the builder of Australia's first Observatory, shown behind his portrait.