I have a great story about Americans only knowing about America. I know not everyone is like that, but when it happened I couldn't give credit.
1993, my first visit to Paris with a couple of friends when I was 20. None of us spoke French. We could understand it if written (too similar to Catalan) but couldn't speak it beyond "Bonjour" and "Merci". We were on our third or fourth day, in the queue for the Louvre, where there was a special show on Medieval maps. We heard two guys in their late 20s speaking English behind us. One of my friends (the one with the best English level then) turned around and started to talk with them. They were American, from Georgia.
Some minutes later, when we told them we were from Spain, one of them told us "You are far from home". I told them we were the country next door to France and showed him a flyer with a Medieval map. "Here's Paris, and here's Barcelona". "Where is America, so I can get some references?" he answered. "It's a Medieval map", I told him. "And?" was his answer. His friend answered for me (I guess my face was showing some frustration then). "They still hadn't discovered us".
I'll repeat it: I know not all American people are like that guy, but he was the stereotypical one. But it's a great story to tell when someone talks about the goodness of the American educative system.