Sunken Hollow

The Underground Cave is a new area in Monster Hunter 4. It is a big cave system with lakes of green fluids and giant spider webs. Those spider webs are made by Nerusukyura, a new monster. Tetsukabura, another new monster that is found in the Underground Cave, lives in ponds of water. Also Genprey, Gendrome and Gypceros inhabit this deep cave system. It's not much more known about this area.