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.
Blackstone Glacier is situated on the west side of Prince William Sound on the outskirts of Whittier. It is only accessible by boat but the trip is worth it, because the views are spectacular. The glacier is huge and if you are lucky you can see how pieces of ice falling into the sea making a noise that seems like thunder, which is called "calving".