American tourists are even more visible in foreign countries, such as China. Due to the difference in language, they have immense difficulty communicating to the Chinese, who are clueless about what they mean by their wild gestures. It is quite humorous seeing an American lift his arms into the air in frustration while the Chinese person smiles (in Asian cultures, smiling is a method of expressing embarrasment). Here are a few things point out that the person is an American tourist in China:

There are many more, but this is all I can think of. Also it isn't only the Americans that do this, most Westerners do. But the Americans are the most visible that's all.