Spend a morning or afternoon at the Sheldrick elephant sanctuary in Nairobi. As the most successful program for orphaned elephants in the world, your time spent here won't easily be forgotten. The calves are hand-reared by their keepers and develop a bond that is amazing to see. Watch as they run and splash in muddy pools, before they guzzle down a bottle for lunch. Each calf has a name and a story (they arrive from all over Kenya) and you can even adopt one of the elephant before heading home.