Third Course (Mystery Adventures Pack)
From the Super Mario Wiki
The level begins in an outside area that leads underground. After traversing a short room with Bob-ombs, Mario will enter a much larger room with a Chain Chomp guarding an ! Pipe and more Bob-ombs. After entering a Warp Door, Mario can hit a P Switch to follow a trail of Blue Coins leading to the Checkpoint Flag, along with a much larger room with conveyors, Pipe Cannons, Chain Chomps, Bob-ombs, and a few bonus rooms where more coins can be found. Afterwards, Mario must enter a Pipe Cannon at the far right of the room to be led to an area with the Goal Pole.