The Aurian Causeway is the main road that allows safer travel between the City of Ruan and Air-Letten, the border fort allowing entrance into Zeiss. This path also provides access to the Sapphirl Tower, which rests just west of the main road.

Travelling this path would be a peaceful walk through the trees if it wasn't full of vicious creatures.

The only item that is found on this route is the Deathblow 2 quartz.