das Lusthaus im Prater At the end of the 4.4km long Praterhauptallee (Prater Boulevard) is the "Lusthaus", it was originally an imperial "hunting cabin" first mentioned in 1560, and was at the end of the unregulated Danube river. The present construction is from 1783, designated as the Emperor's Celebration House, and the nobility celebrated events there. Today there is a cafe in it.