For the zora quest i beleive its just a quest they thaught of making but never actualy did.
probaly when mod town was originaly released.
I can suggest that a water themed town should come out and sell like water stuff and have zorba and zorbi npcs swimmin around.
As for the caves its older And possibly theirs something to it
I like the idea of The golden gate transporting you to places maybe copy Un and make scrolls in each town to gather and with the scrolls yiu can warp there using the golden gate.
Otherwise We will have as usual a bunch of noobs bangng their heads against the gate thinking that itl be opened.