Two young pioneering Mzungu’s and best friends, Tom David and Warren Handley, after summiting Kilimanjaro, undertook to walk home to South Africa. They survived on a mere $2USD a day, and the inherent kindness of strangers. 
Why on earth? To raise awareness about the frightening statistics of orphaned and vulnerable children in South Africa, and to raise funds for early childhood development.
Those 6000 km took them six months. Six arduous months of illness, hunger, sore feet, exhaustion. They learnt that big plans fall away when you’re surviving day by day, and that walking is a slow way of getting somewhere, yet putting one foot in front of the other still means you’re moving forward.