We booked a cruise with Viking Cruise Lines on the Danube. The river was in flood stage well before we left for our trip, they were aware of this and by their own admission, "while we did anticipate and plan for minor disruptions, there was no reason to expect anything of the magnitude you experienced. We believe we provided you with the best possible alternative." The magnitude of disruption to our trip was that out of a seven day cruise, we cruised about 28 hours at the tail end of the trip. The rest of the time was spent being bused to the locations we should have gone to by boat. We spent more time on the bus than at the sites we were supposed to visit. The side trip options to various UNESCO sites were cancelled. I would not say that a bus trip was the best possible alternative. We should have been give the option to postpone the trip since the river was flooded well before we left and there was no information when it would crest. We did not experience anything close to what we should have for this vacation. We have contacted Viking and they feel that they fullfilled their obligation just by getting us to the places listed in the itinerary, even though we had minimal time at most places when we should have had a whole day. We have asked for a partial refund and Viking has refused any type of refund. Instead they have offered a time sensitive voucher for $1000 that we can use on most but not all the cruises Viking offers. We could never travel with them again and would advise others planning a trip with them to reconsider. I have heard other Viking horror stories and Viking always uses the same excuse, "we have no control over the river". The attached photos show the condition of the river when we arrived at the boat. Notice the building already had its flood doors installed. My final words are: DO NOT TRAVEL WITH VIKING CRUISE LINES.