The Alte Donau (Old Danube) is a unique recreation area that attracts large numbers of visitors every year and is also highly important as an ecological niche.
Sports and recreation
The Alte Donau is a natural beauty spot and highly popular recreation area just a short underground ride from Vienna city centre. Up to 1.2 million people visit this "green lung" every year.
The Alte Donau is both a high-quality recreation area and an ecologically valuable habitat, as well as being home to a large number of leisure businesses.
Since 2003, mowing boats have been in operation to ensure that people's enjoyment of swimming in the Alte Donau is not marred by tall underwater plants.