Rocket McGee: Avoiding Trouble! aka the Flight of the Golden Caterpillar features the Magnetic Levitation Vacuum Train (Maglev VacTrain) built by the Hephaestus Corporation to run through tunnels they dug deep into the earth to connect one city directly to another, anywhere in the world, and get there in as little as forty-two minutes! Here’s a rough illustration: a cutaway view of a Golden Caterpillar Pod from Rocket McGee:-Avoiding Trouble! by Roan Reedling, as it makes its way towards the center of the earth, and the kids make their way towards the front of the train.

Cutaway view of a Golden Caterpillar Pod from Rocket McGee: Avoiding Trouble! by Roan Reedling.