I will try to show you how the ”map” to the Black Lodge from season 2 is full of alchemical symbolism that can be interpreted in a very relevant way to the series. By doing this, it will hopefully become clear that alchemy isn’t something I took out of the blue. Alchemy is in fact rooted deeply in the Twin Peaks mythos.
What follows is my own drawing of this map with numbers. I’ll explain the alchemic meanings of, not all, but the most important symbols—and how I personally connect them to Twin Peaks. Please indulge yourself in my interpretation, but keep in mind this is what it is—my interpretation.