Idea: Underwater air pocket cavesystems

Muovipullo

It would be awesome to explore underwater cave system and find air pocket that turns to cave system where you can walk and breathe. So you could dive into the cave systems, and find another cave systems where you could breathe and explore maybe some precursor things or something else, maybe abondoned bases or anything. This idea also gives change for underwater cave hall, where could be underwater lake.
I hope that even somebody understands what I meant.

zimmym

Sounds like a great idea but i'm gonna need to get this out of the way. Usually underwater pressure eliminates this from occurring. What i mean is that the pressure from the water tends to push all the water through cave systems leaving no air pockets behind.

Dracobomba

The closest example, for now, is probably the Mountain island Caves. I'm not sure how things have changed there since the Precursor updates, but they should still be accessible.