How do I find hibernation chambers?

[Chewyy]

Well, I have the first hibernation chamber so far and I've been exploring pretty much everything but cant find another one. Do I have to go all the way back to the first one whenever the rain starts?

[Zorg]

You don't have to return to the same shelter over and over again.
Observe your little yellow helper and watch out for the shelter symbol. If you have time, look at the map for unexplored areas.

[Chewyy]

Yeah I've been looking at the yellow guy but he wasnt very helpfull. Thanks for the tip though!

[Zorg]

If you have explored pretty much everything in the area you could aim for a new one. :)

[Hakase]

He helpful, sometimes. Always check wat he showing, maybe it is sleep chamber.
But yes, they are rare. At this time i always die at rain in new areas.