The part of Sudan I was most interested in was the old stuff. I read that there are more pyramids in Sudan than in Egypt. There are also lots of other ancient petroglyphs and monuments discussed in an excellent BBC documentary on Lost Civilizations that discusses ancient Sudan.
Archeologists keep finding new ancient sites in Sudan. Some are as old as 7000 years. The unfortunate part is that many of the ancient sites in Sudan are not taken care of very well. At the Meroë Royal Cemetery they have done some rebuilding of monuments, or adding entrance chapels onto the old pyramids to show what they would have looked like originally. Here are some pictures from Meroë. We had a great camping site there with a direct view onto the pyramids. There were only two problems: it was too hot to sleep and fine sand dust kept getting blown into the tent all night long.
As I hinted above, it wasn’t all sunshine in Sudan. When we were in Khartoum it was mostly cloudy and rainy (but still incredibly hot). I expected that with everything normally being so dry, the ground would just absorb the rain instantly, especially in the desert. But surprisingly this did not happen. Both in Khartoum and in the desert as we drove north, there was a lot of standing water even a day or more after the rains. It was so wet in one area that we cancelled going to some ruins where we were going to camp because we were worried the car would get stuck in the wet sand far away from any traffic that could help us.