Vale of Echoes is located in the southeast of the Cut. Through this rocky gorge, the Stealth River reaches Kinglor Forest for Echo's Force in the Shadow Wood.
In the Vale of Echoes there are RDA balloons whose sensors must be hacked to access the main drill. Although the plan ultimately fails, Sarentu still manages to obtain data from an air defense station located above the valley and then protect Alex and Anqa in Eywa's Regard.