Thanks. The space there is hard to gauge, but it 8' from foundation to fence and the hill drops 15' vertical in a 30' length, thus the walls/falls. Couldn't really contain the flow and make it work nice any other way. The bump out on the lower falls goes around the chimney from our pellet stove, otherwise it would just be a regular wall from side to side.
It's planted - they are just small still - we ordered from High Country Gardens, which I recommend, but they ship all seedlings, so we started in the hole, and then our Spring was a disaster in terms of growing anything (wetest June on record was missed by 1/8") and it snowed more in May than it did the whole winter. I also took in the Papyrus plants today - supposed to go into the 30's this week at night - which fill the upper pool behind the first waterfall and make that look more grown in. The tree at the top right is a Pear tree which I am going to try and wire shape into a Bonsai style. The Arrowhead in the lower pool did well initially, but I think is a lost cause so I am going to let it croak (it was 8$) and replace it with something more hearty.
I'll put some more pics up over the next next year when it fills in some more, and when there is snow on it too!