The Mine Tunnels are a new location only found in the game Club Penguin: Elite Penguin Force. The Mine Tunnels are believed to be the tunnels between the Cave and the Mine. Another less likely belief of where the Mine Tunnels are is between the Mine and the Mine Shack. The first belief is most likely to be true because the Mine Carts can already be used for transportation between the Mine and Mine Shack. However, they are not needed for the computer game, as Secret Agents have a Spy Phone as a teleportation device between the two. There is a mine tunnel in Mission#8.
In the game, there is another entrance to the Mine Tunnels, the cave in the Wilderness. But this is odd as in the online missions, there is no entrance to the Mine Tunnels, even when Herbert lives there. It is possible that he made them with the Earthquake Driller.