PZ12 is a part of the Danube River located in Austria, Germany, and Hungary. It runs from Regensburg in Germany to Purbach in Austria. The Danube flows through a variety of landscapes, including hills, meadows, wetlands, and forests. The water features of this part of the Danube include islands, channels, and humid zones, as well as a large number of rapids and waterfalls. The PZ12 section is known for its abundant fish populations and its diversity of bird, amphibian, and mammal species. It is also popular for canoeing and other outdoor activities.