I leave it up to gamemasters to create a more detailed map as needed. Caves are shown in red. These are old volcanic vents, smooth rounded walls made of dark igneous rock. The primitives will have fires burning near the mouth of the cave, partly to keep out predators, partly for ventilation. The impliments strewn about the cave will be either obsidian for cutting tools or plain stone for blunt tools. There are piles of dried grasses and pelts for bedding.

There is really nothing else of specific interest in these caves, but if supervillains come to the island they may want to utilize one of these caves for a base of operations. The walls should be given a structural rating of 10.
Forbidden Island - Villains and Vigilantes Source Book
Created and maintained by Craig "Pandemonium" Griswold, pandemonium(at)elpasotel.net