Rolling Yoshi Hills
From the Super Mario Wiki
Rolling Yoshi Hills, or Acorn Plains-3, is the third course of Acorn Plains in New Super Luigi U. It is unlocked by completing Flame-Gear Tower, and its own completion unlocks Piranha Heights and Piranha Gardens.
Before the second POW Block, there is a gray spot on one of the rock pillars that resembles a jumping Luigi.
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