Quay Hollows is an Unexplored Territory in Xenoblade Chronicles X. It is a cave located south of Sylvalum's FN Site 414, on a tongue of rock which extends from the cliff face over the ocean. The entrance is guarded by two Howitzer Launcher Zigs and several Highland Jaculs. Nupopon can be found here during The Divine Nupopon. As with all Unexplored Territories, the discovery of Quay Hollows yields an achievement ("Entering Quay Hollows").