Oh wow! This is amazing. And quite a coincidence. Just yesterday I was sitting in the doctor's waitingroom and saw an amazing picture of na ice-cave in Island. So beautiful and mysterious at the same time.
I went to one of europs largest caves for a two day-trip in Switzerland once, that was amazing. But when I think about an actual ice-cave I am not sure if I wouldn't be afraid as they are probably much less stable and changing every year.