Tower of Pion

The Tower of Pion, also known as Pion Tower, is a tall structure located in the eastern perimeter of the High Council Pavilions of Iacon. It is an "epic" tower.

Dreamwave Generation One continuity
In the Tower of Pion, Optimus Prime asked Prowl how the evacuation of Cybertron was progressing. Prowl answered it was going well, if they fairly took into account the limits generated by the timescale and the unpopularity of the new Prime's decision. Optimus tried to defend himself, but the topic was dropped when the tower began to shake and its windows were shattered. Optimus and Prowl watched as a giant geyser of plasma erupted from the surface, consuming the Forum of Enlightenment.

Live-action film series
Pion Tower is surrounded by Unicron, Uraya, Protihex, the area where The Oracle is located and Iacon.

Animated
Once when Brawn got mad, he tossed a Dyson cube off of the Tower of Pion. Ironhide loves that story.