The nine great realms hang upon the World Tree, yet they are not without connection to one another. Just as the famed Bifrost connects Asgard with the Mortal Realm, Midgard, the Ifing River marks the boundary between the Aesir Divine Realm and the land of the Titans, Jotunheim.
Besides that, Jotunheim and Midgard also share a connection, which is a terrifying iron forest that separates the realm of the Titans from the Mortal Realm, with only a few Mountain Titans frequently traveling between the two.
However, just as Laine failed to see the Rainbow Bridge in Asgard, perhaps it has collapsed due to the Destruction of the world. The Eternal Ifing River, too, is now just a dried-up riverbed.
On one side, it still connects to Jotunheim, while on the other lies the Endless Void. It was by this once-existing link that Laine directly stepped into this place.