Kreopolis

The city of Kreopolis is home to the Autobots and their adorable Kreons. It is a post-apocolyptic deathtrap from which only the hardiest of souls might escape alive.

It is apparently located on Earth, with mountains visible behind the city.

Fiction

Kre-O Transformers Konquest

Decepticon saturation bombing of Kreopolis blasted its Autobot defenders into pieces, leaving it to Optimus Prime's adorable Kreon to retrieve their components by venturing out into the bombardment. Kre-O Transformers Konquest