Dream Land (known as Pupupuland in Japan) is a kingdom on the planet Pop Star. Dream Land is portrayed as a peaceful little place with a large range of scenery and landscapes. The ruler of Dream Land is King Dedede; a wealthy tyrant who is shown to do little or nothing for the best of his subjects or Dream Land itself. The king often causes trouble here, intentional or not (and sometimes, under the influence of mind-controlling villains like Dark Matter), and it's often up to Kirby to fix it and save Dream Land.
Almost all of Kirby's adventures take place here at one point or another.