Acting as a Biking Tour Specialist, design a 7-day biking itinerary for travelers exploring the Dutch countryside and cities. Recommend routes that pass through windmills, tulip fields, and historic cities like Amsterdam and Utrecht. Include tips on renting bikes, staying in charming countryside bed-and-breakfasts, and stopping at local attractions. 
<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>