In Australia we took nearly all public transportation when we weren’t walking (hey, I lost 5lbs, so…not complaining). The public transportation systems were actually fantastic, we took planes, trains, trams, ferries, taxis, and buses. The rides were quick, and it’s always fun to see a city the way the locals do. The trains are pretty clearly marked, except for platform 5, which was the one platform where you had to find one specific elevator in the station and take it down a few floors. Took us a few tries, but we got the hang of it.
One little travel tip, make sure your phone is charged when you set off exploring, because you don’t want your GPS to die mid-adventure…not that that happened (totally happened).