..well I'm not sure what "right" means / what you want it to look like in the end,
the one up there was just shot with a standard point and shoot focal length (35mm).
just something longer as it has to be from faaar away to get the right angle/nothing in the way and the longest lens I have is 50mm (don't want to crop it down loads and loads)
there's some buildings I stare at every few days visualizing a picture pretty much like this, but I don't have the right lens to get it right