"Expedition Unknown" is a television series that follows adventurer and explorer Josh Gates as he investigates mysterious legends, lost treasures, and unsolved mysteries from around the world. Each episode features Gates traveling to various locations, meeting experts, and uncovering historical facts related to the topic at hand. The show combines elements of travel, adventure, and archaeology, often delving into myths and folklore. Gates explores famous stories, such as the search for El Dorado or the Lost City of Atlantis, while engaging with local cultures and communities to gain deeper insights into these intriguing tales.