0 0 0*** Spoiler - click to reveal ***After crossing the bridge and taking a nap you'll come across two paths. You'll want to go right, and then inspect the tree. The combination of the switches in the tree is, "Left, right, right." This will cause the ground to open up, and you'll fall in. There will be three different paths you can take. You'll want to take the right path, and then once agan go right. You'll come across a giant mushroom, and you'll need to inspect it for the achievement.