The track falls apart, there is fire all over the place, you name it. Grumble Volcano comes with a whole package that makes a track hard for all the wrong reasons. Wario's Gold Mine is another track I hate, mainly because the entire track feels like a rollercoaster, and I have acrophobia.
Also you should delete some pages (i think) ive seen these pages about a 8th world in Mario Kart DS's Mission Mode and I know their was only 7 worlds. And most of the images on these pages look like stalk images