I went on a cruise to Alaska about two years ago, and was able to make it out on a photo safari for whales as well as a trek around the Mendenhall Glacier. This photo isn't from either of those spots though.
This was taken on the deck of the ship, during the early part of our trip north when the weather was incredible. We lucked out for the week - only getting rain here and there during a usually rainy time of year, so I can't really complain. This day was remarkable though.
I used a circular polarizer to take some of the glare out of the water and darken the sky to puff up the clouds a bit. It was shot at the wide end of a Canon 17-40 at f/11 for 1/500th of a second at ISO 100.