These led to several legends about submerged cities such as Shahriyunan ("Greek city").
The vast swamps and jungles had been a fabulous laboratory, the submerged cities little more than elaborate pedestals.
First he wondered whether there had been a total climatic reversal that was shrinking the formerly expanding seas, draining the submerged cities.
BBC2 follows the excavation of the oldest submerged city in the world.
The light that came through the half-open door called to mind the strange glow in the submerged city of his dream.
Then he had to explain about that, for of course Splendid hadn't known of the submerged city.
Around the submerged city lived some of the most feared creatures in the sea.
It was even whispered that a kraken made its lair in the submerged city.
When the sea elf came to her summons, she described the submerged city and the forces she had seen within.
It was already longer than a similar passageway at the submerged city of Apollonia.