The Vienna Donauturm (English: Danube Tower) is the tallest free-standing structure in Austria, second tallest structure in Austria, and the 66th tallest tower in the world. It was constructed in 1964 by architect Hannes Lintl in the course of the Viennese International Horticultural Show and stands at 252 metres in height. Since then it has become a part of the Viennese skyline and has become a popular lookout point and a tourist attraction. It is situated in the middle of the Donaupark, which was built to host the horticultural fair in Vienna's 22nd District, Donaustadt, near the northern bank of the Danube. Two high-speed elevators or 776 steps can be taken up to the tower's viewing platform at 150 metres. Each lift takes only 35 seconds to reach the platform, which also bears a bungee site used at times during summer.
Two revolving restaurants (at a height of 160 and 170 metres) offer a varied view over the Austrian capital. It takes the platform either 26, 39 or 52 minutes per revolution.
The Donauturm also carries antennas of cellular phone networks, private VHF radio stations and several other radio communication services. Despite its similarity to TV towers elsewhere, it is not used for TV broadcasting – the major TV transmitter for the Vienna area is situated on Kahlenberg.