Get ready to fly at the speed of fear. These are some of the fastest roller coasters on the planet, reaching speeds of up to 128 miles per hour. Featured Coasters: Top Thrill Dragster at Cedar Point in Sandusky, OH; Desperado at Buffalo Bill's in Primm, NV; Xcelerator at Knott's Berry Farm in Buena Park, CA; Bizarro at Six Flags New England.