I suffer from vertigo. It was really bad as a child, although I think it's gotten better with age. I don't have problems getting up the staircases of high-rise buildings anymore, which is quite an improvement, given that I still suffered form panic attacks while doing that ten years ago. Lifts are a different story, though.
So, I was just reading
this article and when seeing the first picture in it, I actually had to cling to my desk and had a sudden fear that I was about to fall. Despite the fact that the picture was taken from the ground. It made me feel incredibly uncomfortable, like something out of a horror film.