Magmoor Caverns

The Magmoor Caverns are an area of Tallon IV, located west of the Tallon Overworld, southwest of the Chozo Ruins, northwest of the Phazon Mines, and northeast of the Phendrana Drifts. It is geographically situated between all the areas that Samus visits in Metroid Prime, save for the Impact Crater, which is accessible only via the Overworld. The Magmoor caverns are lava filled and very dangerous, supporting such creatures as Magmoors (which the caverns are named after), Triclops, and Puffers.

The Magmoor Caverns are, physically, long and narrow. There are only few very large rooms, and most of it is subterranean, with only two rooms ever being above the surface. Most of its rooms are superheated, and thus, Samus needs to at least have the Varia Suit to traverse through it. The magma, or lava, found here is extremely dangerous and will harm Samus no matter what suit she has on.

Very few abilities are found in the Magmoor Caverns, the Plasma Beam and the Ice Spreader being the only ones. It is the only area in Metroid Prime that has no boss creature.

Another fact about the Magmoor Caverns is that it connects all the areas (or zones)of the planet. Excluding the Impact Crater which is only accessible through the Chozo Temple at the Tallon Overworld.

Trivia

 * Magmoor Caverns has a remix of the Lower Norfair music.