People vanish from national forests every year without blood, without tracks, and often without a trace. In this chilling episode of Axis, Trist investigates the true stories of the missing: from the disappearance of six-year-old Dennis Martin in the Smoky Mountains to modern-day vanishings that eerily align with vast underground cave systems. Featuring the forgotten warnings of President Theodore Roosevelt and the disturbing patterns uncovered by Missing 411, this episode dives deep into the mystery of what may be lurking beneath our feet… and why so many never return.