Alaska One of the last great wilderness destinations on the planet. This amazing state has some of the most spectacular scenery and wildlife in the world. Round trip cruises usually take in all the main destinations on a 7 to 10 night itinerary. Or you can cruise one way from Seattle or Vancouver to Whittier or Seward and v.v then add on a land tour to see the amazing wilderness and wildlife in Denali National Park. Alaska Cruises usually operate May through September.