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...

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.

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.

France, Aveyron, View west above the town of Millau with Viaduc de Millau fog covered bridge.

France, Aveyron, View west above the town of Millau with Viaduc de Millau fog covered bridge.

Portugal, Lisbon, Belem Tower, the Monument to the Discoveries on the Tagus estuary from where Portuguese ships departed to explore and trade with India and the Orient, the monument celebrates the Por...

Portugal, Lisbon, Belem Tower, the Monument to the Discoveries on the Tagus estuary from where Portuguese ships departed to explore and trade with India and the Orient, the monument celebrates the Por...

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...