The rock work is pretty good, though I don't care for the exposed hollow studs on a few of the inverted slopes.
So, the water is coming from some sort of underground geyser/volcano? Very interesting.
Looking forward to seeing the conclusion! Your A1 build was posted on 5/30, so technically you can post your final apprentice MOC this month, if you feel like you can crank out another quality entry that quickly. Remember, no rush on these, as you only get to do them once!
Keep up the good work!