A terrestrial sea in the center of Teyvat. Following the direction of pure currents, crossing wilderness, the depths of the forests and vastness of the sea of sand, arriving at the origin of all the waters of the continent. At the top of the waterfall, in the depths of the capital atop the terrestrial sea... a story that has never been heard, a legend that has been forgotten, like a lost kingdom sunken beneath the waves, yearning for a bard to sing its drowned songs.