Personally, watching slideshow clips in the "Strangers Like Me" musical sequence in Disney's Tarzan always makes me think "Wow... I know a lot of shit." Because I can give at least a basic description of the things appearing in every single clip, and it gives me a hint of the scope of all the motley stuff I know that would be completely alien to me if I had grown up, say, in an isolated tribal village in Africa.

How much of it is actually useful is another matter, but there are certainly occasions where I find myself drawing on knowledge like, say, which is the country of origin of sumo wrestling, which I wouldn't predict in advance to be especially useful.