It is comprised of green bubble-like material in a mountain-like formation. A small number of Grapple Points exist on the ceiling, to help Samus easily navigate the room before acquiring the Space Jump. The lower chambers of the room consist of purple rocks interlaced with artificial metallic beams and a pair of Koma statues, with a few bubbles seeping down from the ceiling.
This room has seven Doors, the two highest of which are Green Hatches. Therefore, "Bubble Mountain" serves as a junction between rooms of Norfair, including a Save Station, a corridor connecting to the long horizontal path, and another corridor leading to the Speed Booster.
- Missile Tank
- In a small chamber near the bottom right of the room, accessible through a small shaft with platforms made of Bomb Blocks. The Tank is on the left of the chamber, suspended above some spikes.
- The green bubbles with red highlights, serving as the source of this room's nickname, are commonly seen throughout Norfair in Metroid and Metroid: Zero Mission, and are even present in the stage in the Super Smash Bros. series. However, in Super Metroid, these bubbles are exclusively found only in "Bubble Mountain", its adjacent rooms, and the nearby Speed Booster's room.