Secret of the Cedars

"Secret of the Cedars" is a Shrine Quest in.

Overview
Link can obtain this Quest by speaking to Clavia on the dock behind the Kochi Dye Shop in Hateno Village. She explains that she found instructions to find a "trial encased in stone" by lining up the trees atop Mount Madorna and heading toward the Lanayru Sea to the east. Though she's curious to find the treasure promised to whoever follows the directions, she claims that she cannot go adventuring herself as she has a child. In her stead, she asks Link to find the treasure and return with it to show her. Through following the directions, Link will find himself at a Cracked Tile wall at the base of Madorna Mountain. Destroying the wall will unveil the Tahno O'ah Shrine, the aforementioned "trial encased in stone." Upon activating the Shrine, the Quest will be marked complete.