- As long as you are below 0 depth and in front of natural Dungeon wall, you are counted as being in the Dungeon. (It is notable that the music changes as well. This is an easy way to tell if you are in the Dungeon.) If you drain nearby lakes or even the 海洋 into the Dungeon, you may want to do it in the outer wall of the Dungeon. Fishing here serves for better protection from Dungeon enemies, and they will also be less likely to spawn.