The Cave Troll is one of two bosses can be found in the Goblin Caves.
From Dark and Darker Wiki
This is a list of Bosses found in Dark and Darker.
The Cyclops is one of two bosses that can be found in the Goblin Caves.
The Ghost King is one of three bosses that can be found in the Inferno.
The Lich is one of three bosses that can be found in the Inferno.
The Skeleton Warlord is one of three bosses that can be found in the Inferno.
Detailed information on the bosses can be found on their respective pages.