© Austria, Upper Austria, Steyr, River Enns and St Michael's Church at blue hour

© Austria, Upper Austria, Steyr, River Enns and St Michael's Church at blue hour

© Austria, Steyr, weir

© France, Alsace, Strasbourg, Ponts couverts and Barrage Vauban at blue hour

© Austria, Upper Austria, Steyr, River Enns and St Michael's Church at blue hour

© Austria, Upper Austria, Steyr, River Enns and St Michael's Church at blue hour

© Germany, Bavaria, Augsburg, Hochablass retaining weir

© Germany, Bavaria, Augsburg, Jakobervorstadt, Retaining weir at city moat

© Germany, Bavaria, Munich, River Isar, Prater Island and St Luke's church in autumn

© Switzerland, Bern, cityscape with minster and River Aare seen from Kirchenfeldbruecke

© Germany, Bavaria, Upper Bavaria, Lech weir and the historic centre of Landsberg am Lech at night

© Germany, Bavaria, Allgaeu, Kempten, cityscape with St. Mang Church and river Iller

© 1960s weir at Hagestijn near Utrecht, The Netherlands.

© 1960s weir at Hagestijn near Utrecht, The Netherlands.

© Landscape with lake weir and snow capped mountains, Dolomites, Italy

© Mulkear river in fog, limerick, ireland