Helix Gardens

Located in peaceful city-state of Praxus, the Helix Gardens is a place of reflection and beauty. It contains thousands of blue crystals, which hang suspended in methane and resonate with a sound to invoke peace and tranquillity.

Dreamwave Generation One continuity
When the Decepticons devastated Praxus 8.7 million years ago, naturally, the Helix Gardens weren't spared.

About 500.000 years later, at the time the old Prime was dead and the new one was to be inaugurated, Grimlock called the prominent members of the Autobot army together at the site of the former Helix Gardens. Prowl was distraught about this, not liking the visual reminder of his lost home, but also confused as to why Grimlock wanted to meet there of all places. Grimlock explained the moment he arrived: the site of the former Helix Gardens was a metaphor—the old ways of contemplation and mysticism were gone, and the new Prime better be willing to do what was needed, or he'd stage a coup.

Aligned novels
The Helix Gardens symbolized the Golden Age for Alpha Trion and contained genomic displays of art that eternally turned in the magnetic wind. Eternal that is, until it was destroyed during Megatron's attack.