Mystery Route Alterations

Yes, that's right, mystery route alterations. I've been looking back over some of the daily routes and identified possible diversions or alterations I can just choose that morning, weather permitting. Some quite off-course as well, but not too strenuous on the extra milage. Possibilities include coasts, borders, even mountains (passing them, not up them). All will be revealed as and when, or if and when, along the way!