Architecture buffs who are really into original design and construction analysis would probably be interested in what a massive "fill" or pushup operation the 9th green is.
It's a good thing too because The Creek had an ongoing real problem with what was referred to as the "lower" or "water" holes" (probably 9-14 or at least 9, 12, 13 and 14) right from opening. Eventually around 1929 it had to be fixed and it cost over $100,000 which could've built a decent entire golf course back in that day.
The green that really fascinates me is the 12th. An original blueprint combined with a piece of an original topo shows that green may've had a pretty radical propped up surface originally quite different from what's there now.