Arvassian Range

The Arvassian Range is a remote mountain range on Nebulos. It serves as a good storage stage for any weapons of mass destruction lying around.

Marvel The Transformers comics
Long ago, Nebulans stored all war weapons in a chamber in the Arvassian Range.

When the Autobots arrived and the machinations of Zarak make it appear as if the Autobots were dangerous, Galen traveled to the Arvassian Range to withdraw the weapons to use against the Autobots.

Ask Vector Prime
In Primax 1086.0 Kappa, the Nebulans managed to defeat the Transformer invaders and stored their deactivated bodies in the Arvassian mountain range. Decades later, Mortilius Zarak, in a play for power, retrieved some bodies from the range to use in his plot.