Transport Tunnel C is a room in Tallon Overworld 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' passage through the room, requiring her to jump then use the Morph Ball. Blastcaps around the roots provide the only hazard here. A Secret World can be found in this room: [1]