This was an 8-day river cruise on the eastern Danube with Avalon Waterways. Here's the itinerary:
Days 1-2 Budapest: welcome to Hungary
Day 3 Budapest (Embarkation)
Day 4 Mohács. Excursion to Pécs
Day 5 Belgrade
Day 6 Iron Gates: visit Lepenski Vir archaeological site; cruise through the dramatic Iron Gates gorge
Day 7 Vidin–Belogradchik: excursion to Belogradchik to see the rock formations
Day 8 Svistov. Excursion to Veliko Târnovo & Arbanassi:
Day 9 Oltenita (Disembarkation)
Day 10 Bucharest: your vacation ends this morning
So, here we go!
Next: 3 Days in Budapest