Acting as a Nature Travel Expert, create a 12-day itinerary for exploring the fjords of Norway. Recommend scenic cruises, hiking routes, and train journeys such as the Flåm Railway. Include tips on visiting UNESCO World Heritage Sites like the Geirangerfjord, staying in remote cabins, and experiencing local Norwegian culture through food and festivals. 
<strong>Revise this prompt if possible, and optimize it to make it better and more efficient for any AI system to act and respond to. 
If possible run your optimized version.</strong>