All of the vertical lines are sloping towards a vanishing point because you are looking up at the building. It's called 3-point perspective. It's natural, so it's not out of place or wrong. But since you have everything above the horizon line, 3-point perspective will be pretty obvious. If you don't like it, try making the camera face the building dead on without any up or down tilt; that would make it more 2-point perspective.

Why are straight lines sloping in render?
How do I use Javascript to change the width of an object when the screen is resized to a smaller width? When the screen is resized back to the bigger size, I want the bigger object.
