The Wyrm

The Wyrm (or Pyrausta) is a Point of Interest in The Wash which houses a story line. Above ground, the structure consists of the head of the wyrm, which appears to be nothing more than a stone statue, as well as its posterior.

Structure
The story line is told through scattered diary entries of an unknown author. The first entry can be found in the Wyrm's mouth. To progress, one has to whistle (as if to call the hoverbike), which leads certain plants in the Wyrm to excrete a stone-like fruit. By dropping this fruit into a yellow-red puddle (presumably some kind of digestive fluid but also the same texture as the liquid at the Glow Worm Cave), all the doors are opened and the water (or possibly second digestive fluid) level is dropped for a brief period of time. This mechanic is implemented in ever more challenging puzzles, while more diary entries can be found along the way.

Story Line
The diary tells the story of an unnamed person who climbed into the Wyrm, presumably a long time ago, and struggled his way through it, never reaching the exit. The diary entries become increasingly dire, as the author is slowly robbed of the belief that the Wyrm is a benevolent god calling for him. Throughout the diary, a person named Ana is addressed several times, possibly a former friend or lover.