@skry Not quite. These openings are part of the tunnel systems blown into these mountains (and neighboring ones) when this pass region was part of the frontline in the so-called "White War" (WWI)... It's all pretty sad and even hundred years later there're still a lot of other traces (trenches, ruins) everywhere (even though this is at 2500m elevation)...

https://en.wikipedia.org/wiki/White_War

Also nearby:

https://mastodon.thi.ng/@toxi/115203009119593813