The Hitchhiker's Guide Project

Magrathea

A legendary planet. Generally regarded as a myth, the Magratheans manufacture whole planets. They lived most of their lives beneath the surface of Magrathea, because they didn't much like the surface.

Ford Prefect, talking about Magrathea: "Magrathea is a myth, a faery story! It's what parents tell their children about at night when they want them to grow up to become economists!"