Maybe I just have terrible luck, but it seems like the vast majority of the labs I find are ice labs.
Also I never realised that that was the reason they were cold. I guess I’d always assumed that it was just because it can get pretty cold underground… combined with climate control having shut down or been thrown out of whack in the apocalypse. Of course that lead me to wonder how it was getting down to -80 degrees celsius or worse down there… 