1. Nile Nile Blue Nile   Kinshasa   Washington D.C.   Rome   Cairo   Hint Half-n-half Clue   2. Potomac   Lisbon   Cairo   Washington D.C.   Cologne   Half-n-half Clue   3. Rhine Rhein   Vienna   Cairo   Cologne   Paris   Half-n-half Clue   4. Aare   Belgrade   New York   Rome   Bern   Half-n-half Clue   5. Zaire (Congo) Zaire Congo   Belgrade   New York   Kinshasa   Vienna   Half-n-half Clue   6. Spree   Paris   Washington D.C.   Berlin   Vienna   Half-n-half Clue   7. Hudson   Washington D.C.   Cairo   New York   Nanking   Half-n-half Clue