Stunning example of an Antarctic iceberg. While the natural bridge just makes you want to cruise right under it, due to the unpredictability of icebergs, it's a big no-no safety wise. The 'berg could roll or breakup without any warning and there would be no time for a quick escape.
I guess it's the kind of thing you'll eventually see on a GoPro video somewhere. After all, there was a GoPro video of a couple guys climbing an iceberg that helped launched the Hero4. Cool as that video is, a pretty brazen thing to do.