I'm sure things have changed since I was there- it was around 1989, but I do remember distinctly the extreme contrasts. It's not that all Mexico is like that - I just have some very strong mental images of kids on the side of the road wearing little more than rags, covered in dust, trying to sell things to tourists on the way to Taxco, and certain parts of Mexico City where the sidewalks were crumbling into sand and the power didn't work all day. In contrast was the Olympic Stadium and the University campus, the Anthropology museum, and the business district full of glass and chrome. I in no way meant to disparage Mexico, I just wanted to prepare the original poster for seeing things he might not be used to in Canada.