1) Island of the Danube 
The Donauinsel (Danube Island) is a long, narrow island, in central Vienna, Austria, between the Danube river and the parallel excavated channel Neue Donau (`New Danube`). The island is 21.1 km (13.1 mi) in length, but is only 70–210 metres (230–690 ft) broad. The New Danube waterway is practically an elongated (swimming) lake, technically a.....