After navigating overnight through Glacier Bay National Park, we awoke to see the first rays of sunlight on Margerie Glacier at the northern end of the park. As we approached the gigantic river of ice, we noticed a lone transient killer whale traveling along side of the National Geographic Sea Lion. Our attention, however, quickly returned to the glacier as massive pieces of ice calved from the face and into the sea. Our guests and naturalist staff gathered on the bow as we turned south from Margerie Glacier and, with our binoculars at the ready, we were treated to a day packed full of wildlife sightings including brown bears, mountain goats, and tufted puffins.