Cybertonium Pit

The Cybertonium Pit was a location on the planet Cybertron where the substance Cybertonium was mined. The location was encircled by a protective Decepticon force field which prevented prisoners from escaping and forced them to mine the green crystals for their slave masters.

After the Dinobots accidently arrived on Cybertron through the Space Bridge, they were attacked by Shockwave's centurions who managed to capture all of the Dinobots except Swoop. Shockwave reprogrammed the Dinobots to be docile and placed them in the Cybertonium pit to mine the substance for Megatron. When Spike Witwicky, Carly and Swoop were also caught, they were banished to the pit. They would "fix" the Dinobots and escape the pit in a prison escape. (Generation 1 episode: Desertion of the Dinobots)


 * Interestingly, the "pit" was made of rock and not metal which suggests that the deeper levels of Cybertron were once the asteroid that Primus in the comics inhabited to create the world of the Transformers.