One of my cousins and her 18 year old son went to Argentina to visit family there. It was legal for him to have beer or wine there but she didn't think he should have any until he was 21 so they got into an epic battle over it.
That wasn't even her biggest fail on that trip! She went to Argentina in June and was kind of underdressed for the weather. She didn't even pack any warm clothes. Yeah, that equator thing has a way of turning a summer vacation into a winter vacation, lol.