We had left Cologne at 2300 and awoke beside the town of Koblenz. One of the advantages of a cruise is that you are usually moored right in the centre of the town.
A guided walking tour showed us the highlights of Koblenz including this cheeky statue.
All aboard by 1030 then we sat up on deck to view the 25 castles of the Rhine Gorge. Some were in ruins while others had been partially or fully restored.
This was the only day we sat on deck and took in the views! There was a lot of traffic on the river which was very narrow in parts.
They have a triangular light system that tells the captain where ships are on the river although no doubt this has been superceded by AIS to some extent.
During the Second World War, the Allies said they would not bomb German castles. The Germans therefore camouflaged railway tunnels as castles so they would not be destroyed.