His most ambitious adventure started in 1979, when he and his two friends Oliver Shepard and Charles Burton started the "Transglobe Expedition". They went from Greenwich England to the desert of Sahara, jungles of Mali and the Ivory Coast, and reached South Africa at Cape Town. From there they sailed to Antarctica and crossed it from one side to another visiting the South Magnetic Pole. Next, they visited Australia, the western shores of America, northern Canada and from there they walked over the Arctic visiting the North Pole. On August 29th 1982, they successfully returned to Greenwich completing their 100,000 mile long route across the globe.

In 1992 Fiennes discovered the lost city of Ubar in Oman with a team of archaeologists and explorers. This city was described as ‘the Atlantis of the sands’ and is mentioned in the Qur’an. In May 2009, Fiennes successfully climbed to the summit of Mount Everest, which was his third attempt, four years after his first try ended in a heart attack a thousand feet from the top. His climb in 2009 at age 65 made him the oldest Brit to ever complete the task - another world record!

In 2013, Ranulph led the first attempt to cross Antarctica during winter. The six-man team was dropped off on the frozen continent by ship in January, and waited until the Southern Hemisphere’s autumnal equinox on 21st March 2013 before embarking across the ice shelf. The team planned to head to the South Pole with Ranulph skiing ahead of 2 bulldozers dragging support equipment. Unfortunately, whilst training there, Ranulph had to pull out of the expedition 4 weeks before the start because of frostbite and was evacuated from Antarctica.

In 2015, he took on one of the biggest challenges of his life by competing in the Marathon des Sables ultra-marathon in Morocco. At age 71, he ran the 156 miles in just over 6 days in the blistering 50°C heat of the Saharan Desert. Sir Ranulph is also a prolific charity fundraiser, having raised over £14m for different UK charities, including Marie Curie.