ya. before going on dives at nemo 33 you can snorkel, but the pit is off limits. that is a large complicated pool that also has a 100 foot pit. my idea pool would be pretty much a vertical shaft going somewhere around 100 feet deep, and it would be a ten or so meter circle. enough to not bump into walls when going down. the cave (or better described air pocket) could have a pressure sealed door to leave through a spiral staircase. unfeasable? yes. but still a cool prospect. a 100 foot deep shaft sounds like something that could get boring. the best thing would be an upside down mushroom type thing, with an artificial reef or something. but it would be compromised, because at 100 feet you wouldnt have much down time with the fish before having to surface, so it would be reserved for scuba or the pool would be shallow. that or you could make the reef at like 50 feet, but in the middle of the reef the pit continues, in a t like patern. that would be cool, but during construction i would imagine it would be prone to collapse. honestly i couldnt afford a pool like that now... but im looking into stuff
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