From the perimeter of the fort the Old Roads spiral inwards toward the citadel, tracing an Unknown, instead of taking the direct path. The Old Roads have a brushwood foundation, covered in sand and silt, and a surface of cobbles, smooth river stones.
When the Empire came they built the New ("Lunar") Road, an earthed road with a gaveled surface, from the gates to the citadel and to the cliff beyond. Because the New Road bisects the fort, the missionaries now say that the Unknown has replaced the old Air Rune.