Please leave any items you may find at the information desk at the Riesenradplatz or deposit them in a lost-and-found box. Following a retention time of two days, the information desk staff deposit every item found in the lost-and-found box. The lost-and-found box is a service provided by the City of Vienna and is emptied twice a week during the main season and once a week during the winter season. If you lose something during your visit, please contact the main lost property office of the City of Vienna directly. Please observe, though, that overlapping times are possible due to the times when the box is emptied.