I think it would be nice to have special maps and minimaps when you're inside dungeons like burial chambers or crypts. The map could contain a toggle option to still view the world map if needed and just like the overworld, the dungeon map could gradually get revealed as you explore the dungeon. I've added some mockups to show a proof of concept.
Source: https://www.reddit.com/r/valheim/comments/12ir7e9/suggestion_dungeon_maps/