Bent steel river bridge with bright blue cyan color in Duisburg Ruhr Basin Germany. Construction with rivets, fixings, beams from wide angle frog perspective on a sunny blue sky day.
Abstract blue metal architecture background
Construction frame of truss bridge against blue sky for industrial background
Detail of the metallic structure of the famous Oporto iron bridge over the Douro river (Portugal - Europe)
Structure of steel roof frame for building construction on sky background.
Geometrical drawing of a blue metal bridge across the Yenisei River in Siberia.