No one has ever regretted discovering Alaska’s astonishing beauty; this fascinating state has some of the most spectacular scenery in the world. Alaska cruises usually operate May through September, with round trip journeys encompassing all the main destinations on a 7 to 10-night itinerary. Or you could choose a one-way cruise from Seattle or Vancouver to Whittier or Seward (and vice-versa) then add on a land tour to discover Denali National Park. If you’re travelling in western USA, how about incorporating a Mexican Riviera cruise? With year-round options from 3-10 nights, it’s ideal for exploring two very different nations. And if you’re straddling the opposite coastline and it’s autumn, you’re in luck. The East Coast and Canada are best for autumnal colours.