Inspired by Ed Stafford's record setting walk along the Amazon, Levison Wood and Simon Clarke have dubbed their adventure Walking the Nile. If successful, they'll become the first people in history to walk the longest river in the world from source to sea, and along the way they hope to encourage others to get off their couch and seek adventures of their own.
Their journey will begin in the highlands of Burundi and Rwanda before descending into the thick jungles of Tanzania and Uganda. From there they'll walk along the edge of Lake Victoria before entering the newest country on the planet – South Sudan. Crossing through the largest swampland on the planet, they'll move into North Sudan before passing into the Sahara Desert for the final leg of the expedition in Egypt. Wood and Clarke estimate that it should take them roughly 12 months to complete their adventure.
No date has been announced for the start of the expedition, but presumably you'll be able to follow progress on Facebook and Twitter once they get underway. For now though, you can get a sense of what they are facing in the short video below.