(CNN) -- Most of the great land expeditions in the world have already been conquered. But British explorers Ben Saunders and Tarka L'Herpiniere are about to set off on one of the last. The two-man team is heading to Antarctica to attempt to walk the 2,987 kilometer (1,800 mile) journey to the South Pole and back. If they succeed, it will be the longest unsupported polar journey in history. They will be re-tracing the steps of Captain Robert Falcon Scott who had hoped to be become the first man to reach the South Pole. It was only when the ill-fated British explorer arrived at the Pole in January 1912 that he found someone else had beaten him to it.
@highlight
Tarka L'Herpiniere and Ben Saunders plan to walk 2,987km to the South Pole and back.
@highlight
If the British explorers succeed, it will be the longest unsupported polar journey in history.
@highlight
They will retrace the steps of Robert Scott, beaten to the Pole by rival Roald Amundsen.
@highlight
There will be no dogs, no support team. Just two men with 200kg sleighs.
Read more: Landmark exhibition celebrates century since @placeholder's fateful journey