First, I'm assuming that you are using 1 RAW image?
OK well with number one, you achieved the opposite of what HDR is supposed to do. See on the side of the ruin where is slightly shadowed? Well in the HDR you came up with that same area is blacked out. HDR should lighten that area up, and darken the areas that are brighter... Does that make sense? ( i kinda confused myself there for a second. ) If not i can draw up a little diagram that explains it perfectly.