Easy to spot in the picture, but I can well understand missing it in the flesh till it threw up that water. I agree with the others though that your ISO was rather too high considering the conditions - the problem there is that with higher ISOs not only do you get more noise, but the dynamic range of the sensor gets compressed - your under and over exposure limits are reduced (Even in RAW) and in a shot like this where you have strong light and strong shadows its a nightmare.
As you learn about controlling the settings keep the ISO factor in mind and try to shift into something like aperture priority to start taking some control over the wild beast that is the camera.
IF you've got the original shot you might be able to get some more detail out of the darker areas by brightening them up - not sure what you will or won't get so give it a try and see.