Castles along the Rhine River are either derelict or have been restored for commercial functions.
The wildflowers along the river are in abundance.
We arrived overnight into Cologne and from first sight, it was noted that it is not the cleanest of cities, yet compared to others it is extremely modern. I noted this just from the flat paving.
The city spends over 100,000 euros each year hiring security to keep the public off the paving. The walking over it adds a noise and echoes in the chamber which interferes with the acoustics.
Many areas in Europe have banned this due to the combined weight of them and the damage it is doing to the bridges.