I love those earlier Scottish route maps. Being stuck in London, I've decided to make a virtue of necessity and adopted a different approach. In a more or less circular area around where I live, I've now ridden every cyclable road in a 78 square mile area around where I live. That would be easy in the countryside but I can tell you that it means thousands and thousands of miles of cycling in an urban area.
So, almost every time I go out for a ride, I go somewhere new yet keep it local and connected. Strangely, I often get lost!