The Sunken City

Ruined buildings at the bottom of the sea in the Bay of Hadriel just south of Ployd . According to popular tales the remains of the new capital of the Third Empire. The story tells us of a city built on wooden pillars. But the pillars rotted, and the city sunk along with the Imperial court and all the treasures. Then Ployd was built as a harbor by the grave robbers. A less flighty hypothesis claims that the buildings were washed away from Ployd by the river Perdigor in the great flood of 348. 
Map IV-sse.
These underwater ruins about 15 miles south of Ployd were discovered in 876 CC by Salaqi fishermen. At that time they were taken for merman dwellings and caused much alarm. Later, in 930 CC, they were visited by the newly founded Adventurers' Society. Lacking proper equipment, the expedition made only a cursory investigation. To the adventurers, the buildings seemed human, but most were buried under the bottom of the sea. Two theories began to emerge. The least sensational is that the ruins simply are houses washed away from Ployd in the great flood in 348 CC. But other speculate that the ruins are the remains of New Suada or Skandelion. The rich refugees from Suada supposedly made a small underwater city. The city was protected by magic, perhaps a clear dome. To this city the rich Suadans brought their treasure, thinking to live forever in luxury. But the bubble, so to speak, burst and they drowned as the water crushed the citizens. No evidence of either theory has ever been presented, but most sages lean toward the flood theory.