The Haunts of Sound Canyon

Most people have only stumbled on Sound Canyon by chance and regretted that day for the rest of their dead lives.
For the few who were lucky to escape, the canyon's dark secret haunts them to their last breath. It isn't easy to carry such knowledge and not share it. But who would believe the story? All tales manage to slip out one way or other. This one did.
I listened. I believed. I found Sound Canyon. And no one has heard from me since.