Home » What river, the second longest in Europe, flows through ten countries and empties into the Black Sea?What river, the second longest in Europe, flows through ten countries and empties into the Black Sea?by Trivia QuestionsApril 25, 2023View AnswerDanube RiverLeave a Reply Cancel replyYour email address will not be published. Required fields are marked *Name * Email * Website Comment * Save my name, email, and website in this browser for the next time I comment. Δ