The shocking differences in basic body language around the world. Sometimes intercultural communication can be harder than we thought. Some things we take for granted may be seen as strange or even offensive somewhere else. Some things to think about!
everything4writers: Cultural Heritage Below the Water Line - OIC Moments The cultural iceberg - worthwhile reading, with examples from Western society versus Native Americans. Either as reference, or for consideration when world building and designing a new culture. Many storytellers do a great job of depicting the surface part of culture, but miss all the subtlety of deep culture.