piond-free waterfalls

Pond-free waterfall systems are a conceptual oddity:  At first thought, they don't seem as though they can in any way appear natural, with their long streams of cascading water disappearing into voids instead of flowing across the large sort of pond that is so familiar to most of us in natural settings. But I'm among those who like these odd watershapes - and I think much of it has to do with the fact that we