Technically, I am not afraid of heights, however I am not about to go to the edge of any high building, or the Grand Canyon and look down, if there is no railing or barrier, like the west rim of the Grand Canyon. Being on the walk way of the CN tower in Toronto was cool, but you won't get me on the tour that goes higher, outside and is connected by a cable. I use to have no problem at all working on a roof, but I will admit, after I turned 50, I had to do something on my roof, I climbed up there no problem, had no problem on the ladder, but once I got on the roof I made the decision that I never wanted to be on a roof again.