the lower part of the falls looks washed out due to the harsh light and the bright sky. you may have been able to do as well cropping down (in camera) and not necessarily include the to of the falls
With two seperate things going on I think it would have been better to focus on one or the other. It would have helped had the rainbow naturally been over the falls..but anyway..good photo. Good luck.
Nice falls, and good job on the rainbow. A well executed picture, but not as much a 'wow' for me. I'm not sure why. I think it might be because the lighting is straight on and less dramatic. 6