Iron Dragon Chapter 193
"i kind of want to go, but i don't think i could leave any of the islands long enough to go see the underwater cities." jenny shivered at the thought of all of the jelly fish that must live on such a world.
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.
A Much Needed Break
One showed a forest, another showed a laboratory of sorts, another was a underwater city, and the last was a factory. "oh oh! this one!" ron said eagerly as he tapped the factory one. "entering stage, robotic factory. be prepared."
Arguments (Book7, Chapter2)
She went 'dark,' and tracked a lead to falcon's underwater city. she's been missing for a while. perhaps she rescued reno nevada. perhaps she was killed. the point is i don't want _you two_ to be killed. fox, topaz, please. i'm begging you.
Tropical Revised - Chapter Five
While the announcer continued, large television screens turned on around the pool, showing different sections of the vacant underwater city.
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.
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.