- Ivory Towers of Zembra. Five gleaming white towers rise above the ramshackle rooftops of the riverside town of Zembra. The nearly identical round towers stand nearly 80 ft. tall. Each is expertly fitted without mortar, and contain an elaborate stone doorway at its base, that is an architectural element rather than functional. Because no doors and few windows (below 40 ft.) are accessible, no-one can remember ever seeing anyone coming out of, or going into the towers. Close inspection of the masonry find that each block was precisely cut, either by a master carver or by Teréðrū magics.