Ancient Ruins of the Eltro Sea

Ancient ruins in the sea west of Tinberra Island. It is in bad shape after being submerged in water for a long time, but its unique appearance is still preserved. If you go through the circular entrance you are lead into a cave with a path going through it. However, nobody knows what is down there. From the outside the ruins look like an ancient weapon, and some believe that is was never actually a building.