With this place, it is best to stick to the inhabited cities of Canberra, its capital, Darwin, Sidney, Adelaide and Perth. The majority of the population of the whole continent is concentrated to few of these crucial main cities. Flexi Day Pass you have a specific quantity of days that you can travel from 3-30 days and you have 60 days to complete the travel days that you can utilize. Let me tell you of one of my experiences to demonstrate.