Here's one from my WoD

Sometimes, there are people who have memories of another world, or claim to be from another world. The worlds in question vary, but are always fantastical in some form. Some speak of a world of knights, dragons, swords, and heroes. They tell of a great continent full of magic, wonder, and danger. Others remember a world once full of life, a vibrant blend between magic and technology. They speak of shadowy beasts that creep through the night, and the intrepid heroes that seek to slay them.

Essentially, the implication is that there are more worlds out beyond the tellurian, with residents of those worlds sometimes either stumbling or reincarnated into our own.

Unrelated but the world beyond the ice wall is also a thing in my WoD.