On the third day we went to Coober Pedy which is world's capital of opal mining with 50% of the house built underground (called dugouts). After a long drive from Quorn we did a "city tour" and went to an opal mining museum. For diner we had excellent pizza, and then after emptying a 2 liter wine we slept in a dugout, which was quite cool. But on the next morning we had to get up at 4!! We had more than 700 km to...