If I don't want to see such perspective distortion in a photo, I would have to shoot with, say, a 50mm (or longer) lens.
Fred .............. I think it is difficult to tell if the camera was level for the photo of the pool. I used to pack around a Texas Leica-Fuji GSW690 with 65mm lens (about equal to a 28mm on a 35mm camera). Unless I used a bubble level perspective convergence would appear in the image. I still keep a bubble level in my bag for WA shots from a tripod with any camera. I took a Brooks Veriwide 100 degree MF camera to Turkey last Summer it had a built in level. Too bad it jammed up on the second roll! A ground glass with a square grid really helps to adjust an slr in many situations. You can move the camera up and down and find level from the buildings in a scene. Bill Lawlor