Into the Unknown

Into the Unknown is an American documentary which aired on History. The series premiered on March 23, 2020.

Uncharted Mysteries follows adventurer and survivor Cliff Simon as he explores paranormal mysteries in some of the most extreme and challenging environments in the world.
From the terrifying bat-winged Jersey devil to Hawaii's deadly Night Runners, Cliff is determined to discover the truth behind these nightmarish myths and legends. That means he uses all of his skills to walk, swim and even crawl his way to places most people wouldn't dare to go.
Along the way, scientists, shamans, historians, and witnesses all provide clues that shed light on dark secrets, which often cannot be explained. He consults with local guides to plan his route. But after that, Cliff stands alone and dares to venture deep into one extreme landscape after another in search of haunted places where wilderness and the paranormal converge.