The RiesenRäderwerk ("Giant Wheel Works") was set up in 2002 as a theme park surrounding the Vienna Giant Ferris Wheel. The main attraction is the panoramic view, which transports visitors into the atmosphere of the old Prater: eight wooden waggons rotate in a carousel and show scenes from the history of Vienna, with the help of puppet shows and audio images. An oversized iris diaphragm repeatedly opens up the view onto the Giant Ferris Wheel. checkpointmedia produced the audio images and the atmospheric sound collage. They also planned and implemented the sound and control systems of the entire multimedia scenario.