Rock Bottom Caverns is home to multiple rats and leveled goblins. This cave is located in the Colovian Highlands, not far from Wind Cave to the north and Weatherleah to the south east.
It is a fairly straightforward cave containing a few log traps and swinging mace traps. After defeating the goblins, there will be a boss goblin and a subsequent boss' chest containing a decent amount of leveled loot at the end of the cave.