European watershed area of the Rhine, which empties into the North Sea via the Netherlands, and the Danube, which flows eastward emptying into the Black Sea. It enters Austria at Piz Buin in the Silvretta Alps running along the Arlberg massif and forming the border between the states of Tyrol and Vorarlberg. It reaches Bavaria, Germany via the crest of the Allgäu Alps and leaves the High Alps at the Adelegg range near Kempten. Within the Alpine foothills it runs north of the Schussen catchment area of Lake Constance towards the sources of the Brigach and Breg headwaters of the Danube in
Vorarlberg energy expenditure. Well-known award-winning architectural projects include the Kunsthaus Bregenz, Vorarlberg museum in Bregenz, Michelehof Hard and Hotel Krone Hittisau. A modern example for Vorarlberg architecture is located in Dornbirn. From 2010 onwards, Vorarlberg had been investing in research on renewable energy sources and energy-efficient houses in order to achieve self-set climate targets. In 2012, the first modular wooden hybrid complex of eight floors was built: The LifeCycle-Tower ONE (LCT ONE). It is 27 meters high and made of wood and concrete. In this architectural design, load-bearing elements are not covered. The benefits of this innovative project are environmental and