Street or travel photography- where is the line?

I don’t think I shot a handful of images which would be considered street photography in my life. I sometimes fail to understand this type of photography, looking at many examples around the Web. Yet I am trying to learn more and discover what it is about. In reading endless articles on-line, I started to wonder. What’s the difference between street and travel photography? Travel photography, more on the side of “I was there” to show to friends and family, is a bit more familiar to me. But I still do not see much of the difference.

For example, let’s look at the work of some people known for one or the other photographic genre. Eric Kim is a street photographer, one of the better known in the Internet photography world (even I have heard about him ;)). His black and white, sometimes grainy images show people going about their daily life, not paying attention to how their bodies and activities complement their surroundings for a perfect composition. Well, not that different really from full of color work from around the world by Nevada Wier.

It looks to me, that the only difference is a familiar Western-culture urban environment versus some exotic location. That the same image shot in Los Angeles falling under category of street photography would become travel photography if shot in Bombai? Or am I missing something?