Work in Progress - 3D Model of Donauturm / Danube Tower in Wien / Vienna Österreich / Austria Europe, Height: 252 Meters. The Danube Tower is a Viennese landmark and an engineering masterpiece, opening April 1964 in preparation for the Viennese International Horticultural Show, the tower is located near the north of the Danube River and Vienna. Now stands resplendent in a stylish reinterpretation of the 1960s.