The European river system is complex and extensive.
In contrast, the sources of the Rhine are located in the heart of the Swiss Alps.
The dry bed of the Danube in the sinkhole near Immendingen.
Photo:Markus Schwei/Wikimedia
It is Lake Constance that connects the waters of both rivers.
Although the Danube never enters the lake, a part of its water does.
The first time the complete disappearance of the Danube was documented was in 1874.
Schematic of the sinkhole locations and the route to Aachtopf.
Until 1877, the relationship between the sinkhole and the Aachtopf spring was suspected but could not be proven.
A sign in Immendingen, that reads Sinkhole Here the Danube sinks dry on about 155 days per year.
As we saw earlier, the river that exits the lake is none other than the Rhine.
There are even guided tours for this purpose.
The dry river bed of the Danube.
Photo:Wikimedia
This article was originally published inLa Brujula Verde.
It has been translated from Spanish and republished with permission.
