Expedition Unknown (Seasons 1–17)

Expedition Unknown (2015) is a Discovery Channel adventure documentary you can watch online on iFILM. Each episode, host Josh Gates travels to a new location chasing a historical mystery — pirate gold off the Carolinas, tunnels Robin Hood supposedly escaped through, vampire folklore sites in Eastern Europe, sunken treasure in the Caymans.

Gates doesn't just narrate at ruins; he dives, descends into caves, and interviews local historians and archaeologists on location. The show has grown across multiple seasons because the format holds: real uncertainty about real places, and a host who seems genuinely happy to be in over his head. Stream Expedition Unknown online on iFILM.