The Ruins; Tamoguna
Currently consists of 3 partially built towers in the Salt Marsh near Arakur. It is in a zombie infested land, so it is a marvel it exists. It is built solely by the halfling Erathis, who was inspired after a strange dream he had.
Built “on water,” because all great cities are. The first door is 30 foot from the ground & accessible only by a rope.