The four musketeers

Iffezheim on the river Rhine, a kind of trinity added a salmon staircase.
Impressive locks on the river Rhine, hydroelectric power station and traffic bridge.
About halfway on an imaginary bird flight line,
between french Strasbourg and german Karlsruhe.

Main to local with dignity

The superstructure of the Silver Jubilee Bridge east of Liverpool.
Usually the connection across the river Mersey and Manchester Ship Kanal.
After having been a main route to Liverpool from the south,
then it will soon be back as a local route as originally planned.

If possible, don’t burn bridges, rather build many more