Transport Tunnel C is a room in the Tallon Overworld. It appears in Metroid Prime. It is a short, cracked, arched tunnel whose walls are green with moss, leading to a larger room that contains a huge Great Tree to one side. The limbs of this tree block Samus's passage through the room, requiring her to jump then use the Morph Ball. Blastcaps around the roots provide the only hazard here.
- "The tree limbs have extended across the room, blocking part of the hall. There seems to be enough room under the limb for something small to pass through."
- The White door leading to Overgrown Cavern can be opened with the Phazon Beam (via hacking) and only from this side.