Forgetting to check visa information. Majority of international countries will require some form of visa to be submitted prior to landing in the country. Brazil and Argentina are renowned for having tough visa laws- especially for Australians. An Australian must apply for a Brazilian visa at least 2 MONTHS prior to departure, send off their passport to the embassy, pay the fee, fill in the forms and have time for them to process! It is not as simple as rocking up in the country! Always check trip advisor for any visa requirements- you don’t want to pay for a flight you cannot take!