Digger Tunnel

The Digger Tunnels are large caves opened up by the Hag 1 digging drill while on its way to the Cauldron Keep in Banjo-Tooie. Klungo engages Banjo and Kazooie inside the each of tunnels for the first two of the three battles with him. Once the battle has been won, the tunnels cannot be reentered.

Since the tread marks from Hag 1 lead straight through the caves rather than all around inside them, it can be inferred that the caves were not created by Hag 1 and were merely tapped into.

Inside the Digger Tunnel
This is where Hag 1 has dug through the mountain from Jinjo Village to Spiral Mountain. The first battle Banjo and Kazooie have with Klungo takes place here. It can only be accessed the first time Banjo and Kazooie go through the entrance from Spiral Mountain to Jinjo Village. He uses either invisibilty, prototypes or increased sized.

Inside Another Digger Tunnel
This is where Hag 1 has dug under the pond in Pine Grove from the Wasteland. The second battle with Klungo takes place here. This entrance is blocked by a Talon Torpedo Door.