In fanfiction, Naruto might attend an American ninja convention by mistake. There, he would meet all kinds of people who think they are ninjas. He could show them what real ninja skills are like, from his acrobatic moves to his powerful jutsus. This would cause quite a stir and he might even start a new trend in the American ninja community.
He could go on a road trip across America. Imagine Naruto seeing the Grand Canyon or the Statue of Liberty for the first time. It would be an amazing sight for him.