Tahni-Xotla : The underwater city

Somewhere in the Pacific Ocean lies the city of Tahni-Xotla. The inhabitants are of no known tribe. Their buildings are shaped in oblong fashion to resist the crushing pressure of the ocean. How did these denizens evolve to survive underwater is still a mystery. There are markers of some Mesoamerican civilizations in the city.

Thanks to Yash for his feedback.