 Ecuador is home to the world s longest mountain range and the world s biggest and most impenetrable jungle, the Amazon.  Last year, more than a million people came to experience this vast wilderness -- and 55 got lost in the country s mountains, jungles or waterways and needed to be rescued.  In this episode, host Bear Grylls paraglides onto the edge of the Andes and follows rivers into the jungle -- bringing him face to face with huge colonies of spear-nosed bats, giant weevil grubs (larvae) and vicious piranhas.  Bear builds a bamboo bridge and a bow and arrow to successfully catch fish, but it doesn t always go his way -- he s forced to ride the rapids of the Amazon on a single tree trunk.