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Very beautiful watercourse.

The natural spectacle is always beautiful

Tummler is the Franconian term for periodically flowing karst springs, which are generally referred to as hunger fountains. These are springs that dry up in the dry season and flow after particularly heavy rainfall or when the snow melts. The so-called “Tummler” are something special and are definitely worth a visit. The dry valley in summer, small Tummler, large Tummler.

In summer, an inconspicuous black hole in the rock face, but with a considerable depth of over 18 meters. During heavy rain and when the snow melts, considerable amounts of water can be spewed out here.

Sinter steps, also known as sinter terraces, are deposits of porous limestone tuff or densely layered limestone sinter in a stream or flowing body of water and, in contrast to stalactites, form relatively quickly. Larger sinter deposits are present, for example, in the Croatian Plitvice Lakes area or the Turkish Pamukkale. The water surfaces arise when bars of secreted calcium carbonate cross the direction of flow in the area of a watercourse. Splash water and changes in water temperature in conjunction with obstacles on the valley floor promote the formation of such calcareous tuff lakes.[1] Small deposits initially form on branches, twigs and stones that have fallen into the water and then, over time, larger and larger secretions form in the stream. Over time, these resulting bars can form smaller basin shapes, the walls of which are marked as steps and damming up the water in a cascade-like manner. The stages are mostly geologically younger formations from the Quaternary. Source: Wikipedia

After the snow melts in spring, karst water emerges from the rock hole, at times in a flood that covers the entire valley floor of the dry valley up to the Heroldsmühle. The stones in front of the rock hole were also washed out. Since the spring runs dry the rest of the year, it is popularly known as the Hunger Well. The emergence of large amounts of water from the tumbler was previously interpreted as an ominous omen. The large Tummler rises from a fissure in the Malm Beta, which is expanded into a spring cave by dissolving the lime. The small Tummler, another karst spring that only flows in spring, is located 200m up the valley. (Source: information board on site)

Very nicely located, but now in August 23 unfortunately quite little water

Depending on the season, the calc-sinter streams near Frankendorf offer a worthwhile natural spectacle. There are many paths and trails to explore in the surrounding countryside with its interesting rock formations.