The passage is the only known way to go from the Vinefields to the outside world that is accessible by foot.
The vines block the Rims steam wall from reaching inside the passage and is guided primarily by one Giant vine that other vines twist around and leave a long pathway.
One the far side of the Passage is the NomadLands. Nomads inhabit the Passage and help travelers along their way. It on average takes a week to walk the Passage.