Having lived and traveled both "places" (and speaking in jest):
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America's cities are vastly more uniform than European ones, especially the mid-size ones. The approach goes big box stores > strip malls > suburbs > trendy strip malls > abandoned downtown > highrise downtown complex. In Europe, it's more quaint medieval village > commercial area > medium density living > high density living > medieval city core
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America's landscapes are vastly more uniform than European ones, outside of a few highlights. Driving cross-country is city > farm land > more farm land > desert > National Park (yay!) > desert > farmland > city. Europe is more city > shrubs > border wait > mountains > border wait > lake > valley > border wait > city
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Europeans think of any European country as an equivalent to America as a whole. That's simply stupid. America as a whole is equivalent to Europe as a whole, and American states roughly equivalent to European countries. States are on average half as big as countries in Europe, but America as a whole is roughly equivalent to the EU. So, yes, a European should know what the capital city of Florida is if they expect an American to know the capital of Poland. (Only Germans and people from Montana can reliably tell you the state capital of Montana, though.)
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American regional cultures are almost as diverse as European ones. Europeans seem to think that it is the language barrier that keeps regional cultures intact and diverse, but an American from California and an American from Texas use the same language but might as well be from different universes. People from Utah think drinking coffee is sinful and drown their uncaffeinated selves in thinly diluted sugar while next door in Colorado climbing 14ers (4300 meter mountains) is a social event that requires crowd control and permitting.