1.3 million square kilometres – that’s the eye-watering distance the School of Air’s lessons are broadcast across daily. If touring during the school term, you may be lucky enough to observe live educational sessions featuring children who otherwise may not have access to public education. Approximately an hour south of Tennant Creek is Karlu Karlu, the Devils Marbles, a collection of hundreds of boulders that vary in size, with some 6 metres high. These boulders have formed over millions of years and continue to crack and change over time. The most prized rock found in this part of the world is, however, gold, which is why your base for the night, Tennant Creek, exists.