Go to the black forest take food and just explore opening the map . If a skellington attacks you or you hear them start searching in the area , if you can t see a stone ruin building theres a massive chance its a dungeon , pop in side i usually just follow the left wall and collect everything as i go , outside at the entrance open your map , double left click an icon you wana use to remind you whats there and label , if you wana remove it i think its right click or double right click the icon on the map , you can use it to label berries and stuff because they will respawn
In the swamp be extra careful search around the swamp areas for glowing green lights this usually gives away the dungeons from a distance , my friend searched one part of a swamp and found no dungeons in it where as i found a small patch and had like 9 dungeons in an area i usually make a little base to leave a cart with a bench and fire , to drop off , fix and carry away my loot , i have also made a road in the swamp to link the dungeons to my port so i can get in and out and away without all those punch ups defending your cart from monsters , you will also find markers to the next mutant monsters in the dungeons , have fun