Nationalpark Donau-Auen is a thin strip of natural floodplain on either side of the Danube, running from Vienna to the Slovakian border. Established as a national park in 1997, it was the culmination of 13 years of protest and environmentalist action against the building of a hydroelectric power station in Hainburg. You’ll find plentiful flora and fauna, including 700 species of fern and flowering plants, and a high density of kingfishers (feeding off the 50 species of fish). Guided tours by foot or boat are available.
