Having progressed from South African coast to mountains, Julia ups the ante as she prepares to head out on foot in one of the world's most famous game reserves. Call it exhilarating or foolhardy, this is a walking adventure amongst the biggest and most dangerous beasts in Africa. But Julia is well looked after by Jaco, an expert game ranger who proves that the Kruger is far more than just big cats and elephants. This is a unique opportunity to roam freely in one of the world's true wildernesses.

• Julia Bradbury