Inspired slightly by the "off the beaten path" thread, where I realised that my journey throughout Cyrodiil was far from over, seeing as over half of the locations told in that thread I had never seen before.
The game continues to amaze me!
I've recently discovered what that cabin on the road from Cheydinhal to the Imperial City is. I can't believe I've never done that quest before, with the vampires. 
I also discovered that the Mages' Apprentice you can have as a follower svckS! Brought him alone for the Battle for Bruma, and he died immediately. 
Note: No spell is powerful enough to prevent annihilation by Daedric warhammer lobotomy.
I also found the beauty of the valleys south of Cheydinhal 

My wizard (who was rather big-headed) merely gets cute Apprentices to follow him through the Imperial City instead of adventures. 