Just curious if there is a standard rule of thumb in determining the height of a grotto. It is off the back side of our pool... it will have a natural stone waterfall on top. There will be dirt mounded up on both sides and behind with a slide wrapping from behind around and into the pool. The slide will require 6.5 ft of height at the entry to have the exit at coping level. The grotto will be about 8 ft wide at the front and about 5' deep with a bench in it.
So, I assume height would be a based on a combination of comfort for walking into it as well as esthetics of width to height... the water depth will be 4' in the grotto and the bench will have about 18" of water depth (I assume these are proper?).
So, what would be a good interior height for the grotto above the water. 7' (from pool floor) would give enough head room to walk in to, but would give only 3' above water compared to 8' width... I am thinking 4' above water might be better.. but I don't want it to appear too large either.
Any advice would be greatly appreciated.