Now, as Steve said, the pic you took of Big Ben (well the Westminster Clock Tower to be precise
) is a really nicely taken picture
Good job matey
With elements you can really play with it though, if you fancy that.
The most obvious thing is a different crop. Cropping it square gives it a totally different look.
I have then made a duplicate rather crudely and quickly, cut out the tower, played with exposure / saturation / contrast in the sky. Then dodged and burned on the tower + a curves tweek. The two layers have then been flattened. Now these are not "classic" things to do to the pictures, it's just to show you how a few quick tweeks can change the picture quite a lot.
Then I did a strong black B&W conversion with contrast and curve tweeks
I hope you don't mind me mucking about with them