Sydney is reminds me a lot of San Diego. The climate and the flora are all very similar. Australia is the most similar in appearance to the USA in my opinion. The cities and houses are very similar. Which makes sense as we are both very large land masses, which are former British Colonies about the same age. No wonder we developed similarly. Though they still drive on the wrong side of the road (in the USA they drive on the "right" side (get it?)) so there are some differences. It is a very nice place to visit I recommend it.