Alaska is one of the most interesting destinations for nature cruises. With thousands of miles of untouched coastline, forests, mountains and bays, the 49th state certainly has lots of places to explore. One of the best ways to see the wilderness up close is to join a weeklong voyage by Princess Cruises. The ship journeys through the Inside Passage, so cruisers are almost always within eyeshot of Alaska's starkly beautiful coastline. Onboard naturalists give presentations about marine and terrestrial animals found in Alaska. The highlight of this journey is the glaciers, which are found in abundance in Glacier Bay National Park. A cruise is a practical way to see Alaska since passengers can travel more comfortably and safely than they would if they had to travel overland or in bush plane.