Having just unlocked another Zenith skin at 8K AP, I've opted for a spear - since I didn't have any nice underwater weapon skins yet.
So...which zone has the nicest underwater exploration, in your opinion? :-)
Bloodtide Coast and Frostgorge
What sleep is here? What dreams there are in the unctuous coiling of the snakes mortal shuffling. weapon in my hand. My hand the arcing deathblow at the end of all things. The horror. The horror. I embrace it. . .
There's a surprising amount of interesting stuff off the coast of the Orr regions. Very worthwhile to explore.
There's supposedly (I've never found the entrance) a BIG krait city hidden under the "main" seabed of Mount Maelstrom.
Blood tide, Frostgorge and any of the 3 Orr maps for exploration and farming.
In addition to what others have said, there’s a nice really deep lake in domain of kourna, kessex hills, and caldron forest has a neat bit too
HARRY! DIDYA PUT YER NAME IN DA GOBLET OF FIYAH?!