What is an interesting cultural artifact or tradition I could give a speech on?

I need a good topic... some examples would be the coffee bean to Colombians or bull fighting to Spain or the boomerang to Australian aborigines or Carnival to Brazil or somethinggg! Can anyone think of something interesting to give a speech on? The above examples are really common topics for the speech, and I want to find something that nobody else is going to do. (Not to mention, nobody is allowed to have the same topic in my Comm cl).