Dome

In The Simpsons Movie, the Dome sealed almost all of Springfield and its townspeople from the outside world. There is a large television screen built into the dome the Russ Cargill used to inform Springfield of the goings on twice in the film. Within the dome, there is no weather (Which in a deleted scene) all of Springfield's crops had died. The only ways out of the dome was not through it, but either through a sinkhole in the Simpsons backyard, and a hole in the top of the Dome where an extremely powerful bomb is placed by the EPA to destroy the town and the dome, with only a gigantic canyon remaining. The dome's outer surface was too slippery to climb, which Homer Simpson used super glue on his hands to climb the dome. The dome is made of extremely thick glass, which is almost completely invulnerable to damage. While only the bomb used to destroy the town destroyed it completely, a few other things had or could damage the dome: Stampy managed to ram into it and create a small crack; also, Professor Frink's acid firing super drill could possibly have penetrated the dome, but never was used because it was just outside the dome. To further prevent Springfieldians from getting out of the dome, the location of the city was erased from all GPS systems. The bomb managed to destroy the entire dome, blasting it into billions of specks of glass and a few large pieces of glass, one that landed on Dr. Nick, injuring or killing him. In the deleted scenes, a baseball field was divided in two. The dome was destroyed by Homer and Bart, when they rode a motorcycle on the inner walls of the dome, reching the hole at the top, and throwing the bomb back through the hole, which landed next to the hole.