Portugal, Porto, Facades on the heavily touristed Ribeira waterfront with a tram crossing Dom Luis I Bridge or Ponte de Dom Luis I.

Portugal, Porto, Dom Luis I Bridge or Ponte de Dom Luis I, Double-deck metal arch bridge over the Rver Douro which was opened in 1886 and is seen here from the Torre dos Clerigos or Clerigos Tower.

Portugal, Porto, Dom Luis I Bridge or Ponte de Dom Luis I, Double-deck metal arch bridge over the Rver Douro which was opened in 1886 and is seen here from the esplanade of the Monastery of Serra do P...

Portugal, Porto, Dom Luis I Bridge or Ponte de Dom Luis I, Double-deck metal arch bridge over the Rver Douro which was opened in 1886 and is seen here from the esplanade of the Monastery of Serra do P...

Portugal, Porto, Dom Luis I Bridge or Ponte de Dom Luis I, Double-deck metal arch bridge over the Rver Douro which was opened in 1886 and is seen here from the esplanade of the Monastery of Serra do P...

Germany, Hesse, Frankfurt, distant view of the new European Central Bank building from the Eiserner Steg pedestrian bridge with the River Main and the green Alte Brucke bridge.

Germany, Hesse, Frankfurt, view of the Main river and the tower of the Kaiserdom Saint Bartholomaus or Frankfurt Cathedral with the Eiserner Steg pedestrian bridge.

Germany, Hesse, Frankfurt, St Leonhard's Roman Catholic church with the towers of the Financial District in the background seen from the Eiserner Steg bridge, it was the only one of nine churches in t...

Germany, Hesse, Frankfurt, view of the Main river and the pedestrian Eiserner Steg bridge from the tower of the post WW2 restored Frankfurt Cathedral or Frankfurter Dom, the Imperial Cathedral of Sain...

Germany, Hesse, Frankfurt, view of the Main river and the pedestrian Eiserner Steg bridge from the tower of the post WW2 restored Frankfurt Cathedral or Frankfurter Dom, the Imperial Cathedral of Sain...

Spain, Castile and Leon, Salamanca, The Roman Bridge of Salamanca with Salamanca Cathedral behind.

England, Shropshire, Ironbridge, Grade 1 listed cast iron bridge across the river Severn.