In Metroid, this is a medium-length corridor of midair platforms and ledges suspended over a pool of lava. Should Samus fall into the lava, there are only a few platforms low enough for her to jump out of it. The platforms and ceiling are made of a brownish rock material compared to much of the rest of Norfair, which is made of either clay-colored bricks or purple bubble-like material. Some tiles in the room also consist of green bubbles. The primary reason for visiting this room is to pass through it on the way to Ridley's Lair.
In Victory Techniques for Metroid, a humorous scene ensues in this room. Samus looks directly into the hole of a Polyp, only for it to fire at her face, temporarily disfiguring her. Soon after that, she is attacked by a flying Gamet but defeats it easily and continues on her mission. Pages 94-96 depict this room and offer tutorials on how to defeat Polyps and Gamets, and to use the latter as a means of replenishing energy and Missile Ammo.
In Zero Mission, the path is a short hallway that runs between the superheated runway and a Save Room. Compared to its appearance in the original Metroid, this is now a straightforward horizontal corridor in a partially lava-filled cave, with crumbled ruins visible in the background. The lava bubbles up from under a bridge spanning the length of the floor, but does not rise to a level where it can harm Samus. A single Baristute stands in her way, but is easily dispatched with her weapons.
- "Superheated runway" (via Blue Door)
- "East green bubble shaft" (Metroid, via Blue Door)
- Save Room 3 (Zero Mission, via Blue Door)
- Baristutes (1 on first visit, later 3)