The Origin Wormholes are the first wormholes to have appeared in the Cleft of Dimensions. They say that the first individual to fall into the Cleft through one of the wormholes became imbued with enough power to virtually become a god.
These initial wormholes became the source of most of what is in the Cleft now.
Since then, all of these wormholes have closed up, but occasionally newer and smaller wormholes appear for a little while.
Colossus Valley, Iktoa AKA Haunted Wastelands
The Arctic Circle