Heading north, we enter the land of glaciers for which Glacier Bay National Park is aptly named. After a few hours we arrive at Reid Glacier, unique in that the terminus is accessible by foot at low tide. (Just a few years ago, it was a tidewater glacier calving its bergs directly into the sea.) Below, our naturalist, Nicholas, inspects some of the icebergs close up. Below right: the blue ice that is just above Nicholas's head is photographed with a telephoto lens.