We took the cruise down the Danube which was fine until a certain point. They neglected to tell us there had been a drought on the Danube for several months, & had run into a problem with other cruises. We found out we could go no further to finish the cruise & had to be bussed for 4 hrs each way back & forth to the ship. The personnel on the ship were not accommodating at all. They would not even consider you making a phone call to make other arrangements. They made us pay for a hotel in Nuremberg which was not on the agenda, just so we did not have to be bussed back & forth 4 hrs ea way. They made us pay to have our luggage transported & were not even going to have transportation for us to get to the airport. So, instead of cruising down the Danube, because the ship could not get thru, we were bussed to our other destinations. We wrote to the cruise line several times to ask for reimbursement & were refused each time. I would never recommend Viking for a river cruise. Other people on the ship were on previous cruises & were given free cruises for the inconvenience, & they say they knew about it before we booked. We should have been informed & given a choice if we wanted to take the chance.