The Ammer, here its unique estuary into the Ammersee, is described as the most scenically beautiful wild river in Germany. It rises in the 2200 m high Ammergebirge, flows through the passion play town of Oberammergau and lonely gorges before it flows into the large Ammersee shortly after Weilheim. However, breeding cormorant colonies in the Ammer estuary are a thorn in the side of fishermen, as they can eat up to 45 tons of fish in summer. The lower course is formed by the river Amper until it flows into the Isar in Moosburg.