Valleyfair Amusement Park (Shakopee, Minnesota) This playground is your ticket to fun! At Valleyfair Amusement Park, choose from among 48 rides, including 8 roller coasters -- try Wild Thing, a steel beast that’s currently the tallest coaster in the park.
Six Flags Magic Mountain in Valencia,CA. I don't even know how to describe this park. The tallest, fastest, most terrifying (read: amazing) roller coasters all flying above the beautiful mountains of Valencia. - The Goliath
Canada's tallest, fastest roller coaster is Leviathan at Canada's Wonderland, in Vaughan, Ontario. The coaster reaches speeds up to 92 mph, making it one of the fastest in the world. Best roller coaster ever.