While the auto correction fixed the distortion caused by the lens, it couldn’t fix the distortion caused by the photographer. To work on that, head to the Custom tab. Start by turning on the Grid, which will help you figure out what’s straight and what isn’t. To see it, check the box for Show Grid that appears along the bottom of the screen. Modify the size to one that helps you judge your image, and change the color to something fairly visible. On this very white picture, red works well. Now hit A on your keyboard to get the Straighten tool. Find what should be a straight, horizontal line on your picture, and click and drag it along that line to right your crooked image. Use the grid as a guide.