Scales and Honor: The Shattered God: Chapter 26
It was then that they neared what could be what they sought, a vast, underwater city of elves. the entrance to this ancient city was carved from the very rockface itself, formed by the skillful hands of ancient elven magicians.
The portal
After a little bit of swimming the pair starts to see a large underwater city. figures swim back and forth, going about their daily duties, as the mephit and shark approach a few pause to stare a moment before swimming away.
Free Running (Book7, Chapter8)
"it will be used to access falcon's underwater city, which he's dubbed 'new atlantis.' if it can be easily accessed, it can be assaulted. he has a submersible fleet to protect it. what if you part the ocean away from it?
Wind of Change: Chapter 31
Dajar and capisa were based on sea drakes, amphibian draconians who had a massive underwater city somewhere in pasafino ocean, and could be said a whole nation underwater.
Scales and Honor: The Shattered God: Chapter 27
Chapter 27: temple of kitu through the underwater city the adventurers swam, till their limbs burned and breaths came in labored gasps. for hours they’d engaged in a tight game of cat and mouse with their sea elven pursuers.
The Price of Freedom (A2,B3,C10)
"pretty soon, we're going to be attacking an underwater city.
World Building- Sentillios
Sometimes ocean are drained but are generally filled with underwater cities. economy focused on services of the extreme particularity. planets like this are most prone to riots, rebellions, and insurgency.
End Game (Book6, Chap20 + Epilogue)
We're in this crazy underwater city dome thing. it's time to go back to san francisco. the dea can't wait to have you back. _i_ can't wait to have you back! we can finally get married like we've been talking about!"
Evokation / Book III: The Tower / Part 8
They destroyed the floating and underwater cities where demons lived and eventually attacked the central spire itself and took it over. and that's it."
Love in the North
But there were stories about flying machines and underwater cities too. "that shepherd implied galvin is using them to watch over the castle." the tiny wolf shivered. "it was hard to spy on you two. you always kept the fires bright."
Atlantis
This place was teaming with so much life, virtually an underwater city of fish and other marine creatures that provided food and shelter from predators. this was the first time captain had gone diving in tropical waters.