They have something like that at Walt Disney World. It’s called “The World Showcase.”
Hi Mineral. Basically pond building is an empirical science. You build something and then see how it works and then adjust it and keep fine tuning it until it makes sense. So you are probably getting the feedback that deeper is not always better. You can try deep and see how it works, but both you and your fish won't be happy. Too hard for you to maintain it and too deep for the fish because the deep water won't have enough O2 because they need to breathe through their gills. I'm also a little concerned that if someone is a little buzzed they might fall in! Are you in WA because I know there are more legal things there to enjoy. Good Luck!