Lava Wurm Cave

I came out of the library to hear that there was trouble in East Forest, but it had nothing to do with Orgas. A cave to the northeast of town had some very hard-hitting creatures called Lava Wurms, as well as Lava Beetles, Lava Walkers, and Lava Elementals. I can't remember ever having been to the place, but others had. However, we did discover deeper caves that no had seen before. [Edit: My mistake. See comments.] Overall though, the area is pretty small. Once the first cave was captured, the rest was pretty easy.