Lunar City

Lunar City is an Autobot base in the Energon cartoon portion of the Unicron Trilogy continuity family.

Sun, sands and fun; come to Lunar City for the vacation of a lifetime.

Lunar City was one of the fortified bases constructed by the Autobots and their human allies, in the ten years following the Unicron Battles. One of its purposes was to search for Energon to mine.

It's on the Moon. But you probably figured that one out already.

Fiction

Energon cartoon

Lunar City was among the first to fall under attack by the Terrorcons. Tidal Wave and Cyclonus were charged with guarding it. They didn't do such a good job.