Cyborg 009 Wiki

Yggdrasill is the base of the Norse God Cyborgs, located somewhere in the mountains of Scandinavia. It is based on the legendary tree of life from Norse Mythology.

It resembles a giant mistletoe tree, but its internal structure is a man-made metal fortress with a network of pneumatic air elevators and a lava moat outside surrounding the area near its roots.

After his defeat by the Cyborgs and before his death, Odin activated the self-destruct mechanism in the hopes of killing them, however they escaped before the tree collapsed into a pile of rubble