Spiral Valley is a landmark in Xenoblade Chronicles. It is located on the upper level of Bionis' Leg. It is where Shulk, Sharla and Reyn find Juju after he runs off to Colony 6. They fight Mechon M71 on top of a large stone slab. Upon defeating this Mechon, Xord comes in and, after a brief battle with the others, he flies away with Juju. After that battle, whenever the party comes to this landmark, a level 90 Unique Monster, the Immovable Gonzalez, guards the entrance, stopping the party from returning to the center. However, a quest later on in Colony 6 allows them to climb up the middle part from the bottom, in Windy Cave.
Gallery
Mechon M71, climbing up to the top of the stone slab, ready for the second part of the battle
Xord at Spiral Valley
Bottom view from Windy Cave