Runo Cave-in (Japanese: ルノ陥没洞, Runo Kanbotsudō) is a Secret Area in Xenoblade Chronicles 2. It is located on the Upper Level of the Cliffs of Morytha, within Idora Cave, and leads up to the Path of the Believer. There is a Heart-to-Heart here - "Constants" - alongside three Collection Points and a Treasure Trove containing a Nopon Doubloon.