Nemesis Inferno is a steel inverted roller coaster at the Thorpe Park theme park in Surrey, England, UK. Its Layout was conceived and designed by John Wardley and then built by Bolliger & Mabillard with Werner Stengel providing the layout calculations (as he has with 100's of rollercoasters, the same Swiss firm that built the related Nemesis inverted roller coaster at Alton Towers. As a result, Nemesis and Nemesis Inferno are often compared, with Nemesis being cited by many as a superior ride.