Tipped off by a great environmental blog, greenfriar.com, I, happened on some spectacular GoPro footage.
From Greenfriar: (If you visit, read the whole post so you get the context; video link is at the bottom).
The Bad News That At Least Comes With The Faintest Silver Lining
Alaska’s glaciers are all melting, but in the process they’re opening up a whole world of ephemeral, short-lived ice caves, so filmmakers from Firefight Films attached a GoPro to a drone and produced this breathtaking footage from inside the caves….
A Few Reasonable Words 