Yoshizilla-Rhedosaurus: I think it's pretty obvious that I love Mario Kart Wii to the point where I make fanfics based on it. It must be a stroke of luck. Or maybe I appreciate the locations. Or something else. Ehh, I dunno, enjoy.
Wide open grassy spaces on the outsides, large caverns filled with mushrooms within large craggy, bluish mountains on the inside. Woioden bridges abound, as well as red and green colored mushrooms that were pretty bouncy. Seemed like a fun place to be, right?
Not if you were struck by lightning.
Or blasted by a winged spiny Blue Shell.
Or berated by a couple of shells.
Or slipped on one of the many yellow banana peels dropped on the race course daily.
Of course, the wilderness of the gorge was a sight to see, what with yellow coins being everywhere and gliding seemingly a popular sport. But don't let that distract you, this place does have nefarious things within its gorge.