This article is about Labyrinths, an unofficial spin-off of Dungeons of Sunnydale, and as such is not considered canon.
The Labyrinth of Sandcastles and Sand is the first labyrinth every explorer has to go through. It is presumably the easiest one and serves as a tutorial level for adventurers. It has various rooms and different paths and has an orange color scheme. It is pretty straightforward and has simple puzzles.