Ride the Levee top roads on the banks of the Danube , Passau to Vienna or Budapest,
and take the boat back up River again.
No, I came South from Prague thru Linz, then rode up the roadway to Passau ,
(lots of bike traffic was going the other way ) then turning west, into Bavaria
Solo.. 1991..
try the tourist information links that exist now that did not, then...
.....