From the Super Mario Wiki
Mount Beanpole, otherwise known as World 1-3, is the third course of World 1 in Super Mario 3D World. The first part takes place on a mountainous grassy structure and the rest takes place in the sky with wooden bridges. It is unlocked by completing Chargin' Chuck Blockade and its own completion unlocks Plessie's Plunging Falls and Switch Scramble Circus.
The level starts in an area with a pair of Sprixies, each with binoculars, sitting in trees. A bridge up ahead leads to a group of Piranha Plants, a POW Block, and a Hidden Block with a 1-Up Mushroom. Further ahead, there are more POW Blocks can be used to expose a Warp Pipe. Next is a series of clouds that leads the player to a wooden bridge; atop the hill to the left is a Cloud Cannon that leads to a Super Star, while the hill to the right contains a 1-Up Mushroom on a blue platform. At the end of another bridge is a Mega Piranha Plant that acts as a "boss"; defeating it reveals a Warp Box that brings the player to the Goal Pole.
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