Rheindelta Nature Reserve

The delta of the Alpine Rhine forms a common delta area with the eastern deltas of Dornbirner Ach and Bregenzer Ach. This delta area extends over the entire valley area (in the shore area from Staad in the west to Bregenz in the east). In the north, naturally the current Bodenseeufer forms the limit, if one disregards the delta continuing under the sea surface. The southward limit depends on the determination of the course of the Bodensee shore after the melting of the Rhine glacier and should be at least a few kilometers. The beginning of the 20th century in the created Rhine trough between Lustenau and Fußach is not an original delta arm and runs in its lower section through the area of ​​the historic Dornbirner Ach delta. Nevertheless, since then the main delta formation has been at the mouth of the Rhine trough between Fußach and Hard, and no longer at the former main mouth of the present Old Rhine. Like the Rhine near Lustenau, the Old Rhine nestles close to the western Rhine valley slope and forms the state border between Austria and Switzerland. The riparian forest on the Austrian side of the Rheinspitz on the old Rhine is called Rheinholz.Source: de.wikipedia.org/wiki/Rheindelta_(Bodensee)

The bike path through the Rhine delta are very nice to drive. Gorgeous section.

The Rhine delta is the largest wetland protection area on Lake Constance and extends from the mouth of the Old Rhine over the mouth of the New Rhine to the Dornbirner Ach in Hard.