The city of Osijek will be a true epicenter of extreme sports from June 5th to 9th, because the Pannonian Challenge festival celebrates its twentieth birthday in the best possible way - with a handful of good fun and adrenaline competitions. The jubilee edition of the leading regional extreme sports festival will nurture the tradition, so, along with the tricks and stunts of the world's best BMX, skate and inline riders, visitors of all ages can expect an excellent music program.