Aizto Pass
Aizto pass lies between the mountains of the Zerua Mendi to the north and the Bikialurra mountains to the west and southwest.
It's shaped like a sideways Y with the two forks to the west. It is about five miles long west to east, two miles wide at the eastern end, and six miles north to south on the western end. The western end is split by a craggy mesa that is the beginning of the western branch of the Bikialurra mountains.
The northwestern fork opens out to the rest of Mendedalde and the Urzuri river runs into it from the north. The Urzuri is not navigable except in short stretches. The smaller southwest fork leads to the Baserriko valley which supplies most of the food for Hai-Itzal. The higher elevations of the valley are forested and home to several elven communities. The Tziki river drains the valley and runs into the Urzuri in the pass. The Tziki river (and the Urzuri downstream - east - of the Tziki) is navigable for smaller river boats all the way to Hai-Itzal.
The northern wall of the pass is a sheer cliff ranging from 300 to 800 feet in height. The southern wall 200 to 600 feet on the western half, dropping to 150 to 300 feet on the eastern half, and only about 100 feet along the southern edge of Ilunur lake.
Ilunur lake lies at the eastern end of the pass against the southern cliffs. It is about a mile and a half from west to east. It is only a quarter of a mile north to south between the city and the cliffs but widens out to almost a mile southeast of the city.
Across the eastern end of the pass lies the Wall. Seemingly made of a single unbroken slab of stone it is eighty feet wide and runs arrow straight from the northern cliff south to the narrows of Ilunur lake and 60 feet further out into the lake. The center is 40 feet wide, 25 feet high, and rises in 5 foot steps to both sides (east and west), reaching to 45 feet high. There are five openings in the Wall. One close to each end, one in the exact center and one halfway between the center and each end. Each opening is 40 feet wide, 15 feet tall in the center with the roof sloping down to 10 feet high at the sides. There no surviving original towers or gates at the openings but gates and gate-towers have been added.
At the northern end of the Wall the dwarfhold of Zamek lies inside the northern cliff. The city of Hai-Itzal is at the southern end around the southern gate and along the Ilunur lake on the western side of the Wall.