Secret Course 14
From the Super Mario Wiki
This level is made up of multiple cannons that the player must enter. The course starts off with the first Bonus Medal right before the first cannon. The cannon must be entered to shoot through a Fire Chain moving up and down, which also has the second Bonus Medal in the middle of it. A Red Ring and the second cannon are immediately after that. The player must shoot to the right through three smaller stationary Fire Chains, which is also where the Red Coins from the Red Ring appear, allowing the player the opportunity to obtain a Super Star. After that is the third cannon and after the third cannon is another Fire Chain moving up and down with the third Bonus Medal in the middle of it. The player shoots to the fourth cannon, which makes many Blue Coins appear. The player shoots into the fifth cannon and then must shoot out of it into the last two Bonus Medals that are in the middle of two Red Rings right before the Goal Pole.