Taking photos directly into the sun is one of those things that is really meant to be a big 'no no' within photography.
It's understandable why, film cameras could never expose the whole scene correctly with such a strong light source ion the frame. The case is exactly the same for digital cameras too, however HDR software has made it possible to create such images.
HDR works by combining a series of photos that are identical in composition, but different in exposure, so that between them contain detail in most, if not all, of the shadow and highlight regions. Purists may consider it cheating, but there was an awful lot of illusion that used to go on in the dark room, so I don't have a problem with it. Have a look at the photos and see what you think.