Cathead Mountain

Bil rotating the mountain, to come through the tunnel more easily

Cathead from Tunnel Room

A view at the Cathead Mountain from the Tunnel room

The Cathead Mountain is a tall white and blue cone-like structure at Bil's place. At the bottom there is a tunnel which lets Klaymen move between the teleport machine and Bil's hole, and above it Willie Trombone seems to have a flat. Bil is able to rotate it using the crowbar.