Using natural cliff with no liner
here is my starting point (link below). Where you see the tools will be the pond area and I'm thinking to build a waterfall from the top of the cliff (right where the retaining wall ends, in the center of the picture). the hight difference is 6' and the length is about 12'.
my question is whether I can use the natural cliff as the bottom of the waterfall and not to lay the rubber? on one hand, it may look nice as it's natural stone already in place. on the other hand, i'm puzzled how to pass water to the pond and how to connect the pond's edge and the cliff.
what do you think?
Here is a link that might be useful: starting point