Repost here: http://desho.wp.xdomain.jp/26/ (in Japanese) See this post if you need actual image, because I only post a translated script here.

In Vaal City there is only 4 layouts even its size of the map.

-Pattern 1 -- Go straight, and left aside of the wall. -- If you find the cliff, go along with it. -- The goal is in the next wall.

-Pattern 2 -- Go straight, and left aside of the wall. -- If you find the wall is too long to go aside, the goal is inside of it.

-Pattern 3 -- Go straight and you find a narrowed path between 2 walls. -- Go that path and the goal is in front of you.

-Pattern 4 -- If the cliff is in front of you at the entrance. -- Just go along with the cliff. -- The goal is inside of the final wall.