A new biome in the middle of the game, located to the right of the pyramid. The difficulty should be about the same level as the jungle. You can open a portal to the volcano in the sacred mountain after the jungle by using the cup there. All you have to do to open the portal is pour some teleportation potion into the bowl. At the bottom of the volcano there is a perk and a portal that leads back. If the portal has NOT been opened, the portal will return to the surface, otherwise back to the bowl.

To install, transfer the contents of the archive to - Noitamods