Hiking on the glacier was more strenuous and difficult than we anticipated. They supplied 'hob-nailed' boots for traction, as well as 'cramp-ons' that we strapped on in addition, to maximize our footing. Each of us had a walking stick with a long metal spike at the end as well. This shot shows my wife stepping over a reasonably deep crevasse. It was fun and nerve-wracking at the same time, since there was definite potential for bodily harm with a mis-step!