First, it's really tricky to find a proper exposure due to the high contrast between the glaring sun and the dark cave walls without some sort of graduated filter (which acts like sunglasses on your lens for part of the image). The easy way to deal with this would have been to make an HDR (which most people seem to have some concept of these days...it's a composite of normal, over, and under-exposed images)...but I'm not a huge fan of HDR's because they usually look contrived/other-worldly.
It was also difficult composition-wise, because there's nothing to balance the cave wall against unless you do a panoramic shot (which I'm also not a big fan of). In the end, I decided that the best way to balance the composition of the image was to use the reflection of the pools to follow the line of the cave wall, thus creating some semblance of visual continuity.
All said, it's not a perfect image, but at least it gives you some idea of what the setting looks like. I'm looking forward to going back there and giving it another (more concerted) effort later this week, hopefully.