Eggmanland

Eggmanland is an energy refinery designed to resemble an amusement park with lethal attractions created by Dr. Ivo "Eggman" Robotnik as part of his plan to harvest and refine the energies of Dark Gaia unleashed during the Shattered World Crisis.

Conception and Creation
After determining that Dark Gaia's raw power was a source of energy more abundant than even the Power Rings-though not exceeding the limitless energy of the Chaos Emeralds-Dr. Eggman determined to harvest it for his own uses. Due to his own eccentricities, he decided to construct a refinery that incorporated death-trap thrill rides into its design, something that Orbot felt was a waste of time and resources. Eventually he succeeded and Eggmanland was born, and it soon began harvesting Dark Gaia's energy, the goal being that it would be used to supercharge the Death Egg. (StH: #266, #276)

Background Information

 * Eggmanland first appeared in the game Sonic Unleashed.