Donauinsel

The Donauinsel, or Danube Island, is a long, narrow artificial island in Vienna, Austria. It lies between the Danube River and the New Danube, a parallel artificial channel. The island was constructed between 1972 and 1988 as part of Vienna's comprehensive flood control system. Its primary purpose is to protect the city from Danube floods, with the New Danube serving as an overflow channel during high water levels.

Stretching for over 21 kilometers (13 miles) and with a width of about 250 meters (820 feet), the Donauinsel has become a popular recreational area for Viennese residents and tourists. It is accessible by public transport and features extensive paths for cycling, jogging, and rollerblading. The island offers numerous sports facilities, including beach volleyball courts, playgrounds, and areas for water sports like swimming and boating in the New Danube.

The Donauinsel also hosts various events throughout the year. Most notably, it is the venue for the Donauinselfest, one of Europe's largest free open-air music festivals, attracting millions of visitors annually. Designated areas on the island cater to different activities, from quiet natural zones and meadows for relaxation to lively areas with bars and restaurants. The island is largely car-free, contributing to its peaceful atmosphere and making it a significant green space within the urban environment of Vienna.