Mario Kart 7 Easter Egg - Hidden Rupee

Go on Mario Kart 7 and play any battle game, coin or balloon. Then select "Wuhu Town" as the battle course. Now face the fountain with the ramps and archways being behind it, from here go directly left towards red buildings. Keep going in that direction until you reach a fence with a lamp post at the far right of it. From here simply gaze past the fence at the cliffs and you should see a large hole in the cliff that looks like a Rupee from the Legend of Zelda games. Note that this can only be seen in "Wuhu Town" the battle course but in neither of the Wuhu race tracks.