Back to more pleasant things.
This is the Ponte de São João or St John’s Bridge in Porto which appeared in the background of my photos of the Maria Pia Bridge and replaced it as a carrier of rail traffic across the River Douro.
It’s another elegant concrete structure:-
If you look to the left of the bridge support in the above photos you can see kilns. Those brown things look like kilns anyway. This closer view also shows the nice arches on the river embankment:-