After continuously advancing to the deeper floors, only then did Yman realize that this dungeon wasn't what he envisioned in his mind.
Initially, he expected it would resemble the dungeon in magical fantasy comics, a humongous dark place like a cave. To his surprise, after leaving the first floor, the interior began to resemble ancient Roman architecture.
The walls were made of stones and bricks and there were intersections every now and then, just a few steps away from each other. It is easy to lose your way here if you're not careful of your surroundings.