Created this map for my last DnD session. The right side was filled with Zuggtmoy infected dwarves commanded by a mutated myconid. The left side was filled with bugfolk and their insectoid allies commanded by a humanoid-appearing queen. They had the option of allying with one side against the other, fighting both sides, or just fighting/sneaking through the left side to get to the exit. There's a lot of tight squeezes for small or tiny creatures (goblins/kobolds/etc.) to take advantage of and some underground streams for shortcuts or sneaking through.