The northernmost destination of the cruise is Hubbard Glacier. According to a report by the U.S. Geological Survey, it is the largest tidewater glacier on the North American continent. It is also significant because it is advancing, rather than shrinking. The ship slowly passes by the glacier, and if you're lucky, you can see it calving, when a big chunk of ice falls, and sends out a massive shower of water. It sounds like thunder when the chunk falls from the face of the glacier.

Click on the images to see a full-size version.

Calving begins as chunk of ice falls into water	Just a few seconds later
More calving (left side of photo)	This little iceberg was about 10 feet long
A line of floating ice chunks	Hubbard Glacier stretches 76 miles
Face of Hubbard Glacier	Ship's tender gets close to glacier's face
Glacier watching from pool deck	Joyce is ready for a closeup view