One of the two sources of the big Main, once red and once white. Here it begins until it ends at Wiesbaden in the Rhine after a good 500km. Just a must visit for hikers in the region to then even the Weißmainfelsen (beautiful view) to climb.
White and Red Main unite at Kulmbach to the Main which later flows into the Rhine. This then in the North Sea. The red Main is the water poorer river, but longer. Red Main about 72km, white Main about 52km.