Ben 10 (2016) Season 4 Episode 15 Bottomless Ben Episode Title:Bottomless BenEpisode Description:While visiting Carlsbad Caverns National Park, the Tennyson's come across the "Bottomless Pit", a naturally formed pit with no bottom. Ben fights his better judgment to jump in the pit and be the first person to find the bottom, until Kevin 11 shows up and starts to goad Ben into a contest to the bottom of the pit! The natural rivalry is put on hold, however, with the arrival of Breaker One-Nine, who has come to destroy the Caverns!