Fly Trap

Not much is known about the Fly Trap, except that it is in Der Riese, the zombie map from map pack 3, and there is a acheviment called "Elevate Your Senses" after activating it. It is most likely based off of "The Henge", nicknamed "The Fly Trap", a anti gravity device associated with "Die Glocke". The anti gravity would explain the "Elevate" part of "Elevate Your Senses".