Rail Map

Rail Maps are items that appear in Spirit Tracks. Each Rail Map reveals lost Spirit Tracks to its associated realm. There are a total of four Rail Maps: Fire, Ocean, Forest, and Snow, and each are found inside the Tower of Spirits, on floors brought together after defeating the previous dungeon.

Trivia
In the UK PAL version of Spirit Tracks, the Rail Maps are referred to as Glyphs (i.e. Forest Glyph, Ocean Glyph etc.)