There are many legends in the Hungarian folklore about tunnels under the Danube. Where once a Roman watchtower, a medieval castle, or any kind of bigger ruin stood on the banks of the Danube we can be sure that the locals have the knowledge about a mysterious tunnel leadning to the other side. Most of these tales are just fantasies, in any era it was much cheaper to row, than to dig. I know about only one tunnel under the Danube that exists. And fortunately its owner, The Danube Regional Waterworks Co. opens this tunnel for the public once a year. After short organizing twenty-three of us started our 550 meter (600 yards) journey.
It is always a great experience to cross the Danube on dry feet. Between
Visegrád and Nagymaros this opportunity existed only once, when Emperor
Franz Joseph personally lead a combat training exercise, which had a part to construct a pontoon bridge across the river.