Disney characters make unexpected appearances all over Tehran 's theme parks . For roller coaster obsessive and self-styled `` Theme Park Guy '' Stefan Zwanzger , who toured Tehran 's funfairs last month , Theme park expert Stefan Fischer says Australia is home to one of the world 's worst roller coaster . Zwanzger has over 150 theme parks on five continents .
Disney characters make unexpected appearances all over Tehran 's theme parks . Theme park expert Stefan Fischer says Australia is home to one of the world 's worst roller coaster . Zwanzger has over 150 theme parks on five continents .