How two engineers, Jacques Piccard and Lieutenant Don Walsh, became the first people to journey to the world's greatest depth, the bottom of the Mariana Trench in the Pacific Ocean in 1960. Watch more films from BBC Witness History: https://bbc.in/3oQt4to | BBC World Service

Grab your goggles, it's Part Two of our Sea of Thieves: The Legend of Monkey Island Deep Dive! From Insult Sword Fighting and ziplines to wacky arm-flailing salesmen, take a peek behind the oddly patterned curtain to learn about more of Mêlée Island's unique challenges. | Sea of Thieves