The highlight of any cruise through the Inside Passage has to be Hubbard Glacier. It is one of the most active glaciers in the area and a great place to experience the majesty of a glacier up close. Sheets of ice separate themselves from the ice field in a process known as "galloping." When the ice finally crashes into the sea, you can hear a loud cracking sound, similar to a starter pistol. This process is known as "calving," and the sound echoes for miles.