World 6-A (New Super Mario Bros. 2)
From the Super Mario Wiki
The player starts on a platform next to a Lava Bubble, and must enter a red pipe to access the level; it takes them to an area with five more Lava Bubbles followed by several groups of coins further down. In the next section, the lava will begin to rise as soon as the player begins moving to the right. The area contains several coins along with Dry Bones, Lava Bubbles and Big Dry Bones. Near the end, there is a ? Block that contains a Star inside, followed by a red pipe that leads to the exit and the Goal Pole.