Pathfinder Map Pack: "Cave Tunnels"

 So there I was, minutes until the session started.  I had a tenebrous worm ready to attack the PCs in some tunnels deep under a d'ziriak hive, and all the flip-mats and map-packs I looked at had traditional constructed dungeon corridors instead of the natural tunnels I needed.  And then I spotted Cave Tunnels unopened on my shelf, and knew it would be perfect!  There's nothing fancy about it, but it does exactly what you need it to do: natural rocky tunnels in dim light with plenty of branches.  Certainly something one could use for all sorts of quick random encounters underground.  The players might not have been happy about the resulting slaughter, but for a
harried GM, it was gold!