Here’s what I’m thinking of dungeons in my current campaign world. It might be good to put it into words.
- Dungeons are like tumours growing in a body exposed to toxins and radiation.
- Dungeons are like the protective patina that forms on copper when it’s exposed to weather.
- Dungeons are like the swelling around an infected wound.
In this case, the radiation, weather, and infection are all the Other, the strange cthuluuverse that wants to devour the world.