A popular photographic motif in Vienna is the Spittelau waste incineration plant, whose façade was redesigned and given its present colorful, irregular structures by eco-architect Friedensreich Hundertwasser following a major fire in 1989. Since then, the former utility building has combined the topics of waste, energy and art in a fascinating way. Vienna's waste, recycling and disposal system, as well as the environmentally friendly generation of thermal heat and hot water contribute to the high quality of living in this city.

The Danube power plant at Freudenau is of interest to everyone who wants to know how electrical energy is produced from hydropower. As one of the most state-of-the-art hydroelectric power plants in the world, it supplies electricity to half of all homes in Vienna. More than 14,000 boats pass through the power plant's locks every year. These locks lift boats 10 meters almost imperceptibly in about 20 minutes.

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