What can be seen on an Alaska Cruise?

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For many people Alaska remains a far-off land full of mystery and intrigue, and as such it can be found on many a bucket list. Thankfully, more and more cruise lines are introducing Alaska itineraries, bringing this fascinating destination closer than you might think.
If you have booked, or are thinking of booking an Alaska cruise, you might be wondering just what this northernmost American state has to offer. It is well known that the scenery here is spectacular, but what exactly are you likely to see?