This modification is intended mainly for those who like structures that are largely submersible or completely underwater. You can find them in Nether and End. So far there is only a early progress version but in the future will add a lot of new things.
For Minecraft 1.15.2- 1.16.4
Phenomena Dungeons coming soon!!!
CurseForge link: Phenomena Structures - Mods - Minecraft - CurseForge