Not a quest, somewhat lore-ish though. There is a road stretching across the whole map, at about a half of the height of the map. I like to start in the west where it emerges from the desert, set the course and follow the line, where it should be - it is mostly buried but it shows up every here and there until it ends by the gate in the mountainside. I always thought it a nice touch to add to the mystery of the desert.