Danube Sinkhole — Attraction in Verwaltungsgemeinschaft Tuttlingen

This is a true natural phenomenon. During the dryer season of the year, the Danube disappears completely underground, only to reappear in the Aachtopf 12 km away as the crow flies. It takes the river about 60 hours to cover that distance. Reason is the karst formation of that region. When visiting in the winter, the riverbed will be carrying water, sometimes so much that it floods the extensive meadows between Immendingen and Tuttlingen. So to really get the whole experience of the disappearing Danube river, you should visit in a dry summer and return in winter when the water is back...

An interesting place to visit and a quick stop as you peddle the Danube. There are places to park your bike and walk across the Danube on a set of well places granite boulders. In the summer or dry periods the Danube will disappear into the ground. A great place to cool off on a...

It‘s not only an impressive natural phenomenon to see but also a nice resting spot while on the Danube bicycle tour. When dry, you can hike for a quite a while on the riverbed in both directions. Signs with an explanation to the site are available and are interesting to read,...