It's a tough exposure to catch here, Sergio, and you get lots of credit for giving it a shot (no pun intended). You need a little more contrast here to make the blacks deeper, but it will be tricky to do so without losing the top of the building and without turning the light in the pyramid into a hot spot. If you have photoshop, I would recommend dodging the brighter spots and then playing with the curves.
As far as taking an original picture with the proper exposure, that would have been trickier. I'm assuming the "2" for shutter means two seconds, which is a very short period of time. You could consider using a ND grad filter set to cover the pyramid, or if you have cokin filters, I have heard of photogs fooling around with cutting gels for specific exposure coverage, which seemed like an awful lotta work!
If the shutter speed was two minutes, you can consider blocking the light from that area into the lens every couple of seconds to darken the initial exposure. This, too, seems like an awful lotta work.
Good image, Sergio! Thanks very much for posting it. Keep shooting!
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