Passage Canal is a channel of water in the town of Whittier, Alaska. In order to reach Whittier, either by car or by train, you have to go through the Anton Anderson Tunnel. The tunnel is over 4 miles long - the longest in North America. Whittier has a deep harbour and many boats and cruisers frequent it. From the Passage Canal you pass to Prince William Sound, where you can see glaciers, whales and all sorts of animals.