The following is another example of a possible lego structure you could build. Of course it is always fun to build them on your own, but just in case you are in a bind for time. Feel free to use any of the examples. The following steps are outlined and provided with pictures.

First you must start with a basic base structure, as you can see below this is constructed of 3 simple lego peices, made into a U formation.

Next as you can see below we added 3 long blocks, 1 of size 4x1x2 and 2 orange ones of size 4x1x1. They were simply added directly on top of the base.

Here are pictures of two towers that will be placed onto the structure we have built thus far. These two towers are exactly the same. Notice the square block base that curves over at the end. Now take a look at the two smaller rectangle blocks, and lastly a small 1x1x2 block with a figure on top of it. These are placed on top of the structure we have built.

Lastly here it is all together, with the two matching towers on top of our structure base. Different angled pictures, for your viewing pleasure.