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Season 1 Episode
- Season 1 Mystical Structures
- Season 1 Defying Death
- Season 1 Biblical Artifacts
- Season 1 Extraordinary Abilities
- Season 1 Dark Forces
- Season 1 Signs of Alien Life
- Season 1 Glimpses of the Future
- Season 1 Mysterious Disappearances
- Season 1 Legends Unveiled
- Season 1 Decoding Genius
- Season 1 Secrets of Ancient Civilizations
- Season 1 Criminal Masterminds
- Season 1 America's Unsolved Mysteries
- Season 1 Beyond Earth
- Season 1 Monster Mayhem
- Season 1 Strange Forces of Nature
- Season 1 The End of Days
- Season 1 Ancient Ruins Revealed
- Season 1 Dangerous Depths
- Season 1 Enigmas of World War Two
- Season 1 National Secrets
- Season 1 The Quest for Lost Treasures
- Season 1 The Mystery of Faith
- Season 1 Encountering Evil
- Season 1 Beyond Death
The UnXplained Special Presentation - Season 1 Episode 19 Dangerous Depths
7.00 45 minutes For centuries, mankind has wondered what lies hidden in the depths of the Earth. For instance, what military secrets do underground bases like Area 51 and the Cheyenne Mountain Complex hold? And can discoveries in tunnels from the ancient past, like the Tayos Caves of Peru and the Longyou Caves of China, illuminate the cultures of lost civilizations? As humanity develops and digs further into the Earth, including the search for rare elements, what else will we uncover?
