The cave is a large, roughly cylindrical room that focuses on vertical movement. The very bottom of the cavern has a steaming mound of earth that seems to resemble a large anthill. If Samus comes within close proximity of this mound, six Beetles will emerge. To ascend any higher than halfway, Samus will need the Grapple Beam and preferably the X-Ray Visor, as after swinging from a Grapple Point, four invisible platforms lie ahead. It is possible to scale them without the X-Ray Visor, since rain splashes on the platforms, giving out their locations. At the top of the room is a Red Door leading to Arbor Chamber.
- Missile Expansion
- After jumping up all four invisible platforms, if Samus turns to the left there is a small cave with the outside covered by vines. Samus can see past the vines and to the Missile Expansion inside with the X-Ray Visor.
- Water droplets
- "These water droplets seem to be stopping in midair."
- Beetle lair
- "Analysis indicates incubating life-forms below the surface."