I grew up in the US but have traveled through East Africa as well as most of the rest of the world, I don't think there's any major human population center I ha

I grew up in the US but have traveled through East Africa as well as most of the rest of the world, I don't think there's any major human population center I haven't been to. My answer to your question would be a qualified no. You'll see more phenotypical diversity walking around New York than Nairobi thanks to globalization. With that said, the qualification I'd put on that is that if I consciously think about what region of the world I've seen the most variation in body plan/portions and facial geometry, I'd probably pick East Africa. You do do encounter pretty much the full spectrum of shapes human beings come in. I will also say that I remember being surprised by how much variation in body shape I saw in China. Maybe this is pure western ignorance but I had an idea in my mind about what the average Chinese person looked like and I found myself having to adjust my expectations in ways I have no had to do anywhere else. The last thought I'd leave you with is that you absolutely should make it a priority to visit East Africa. Kenya in particular is where I always tell people to go but Uganda, Rwanda, Ethiopia are all good options. It far exceeded my expectations. Stay out of Nigeria though lol