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, view of the Main river and the tower of the Kaiserdom Saint Bartholomaus or Frankfurt Cathedral with tourist sightseeing boats moored on the waterfront.

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...

Germany, North Rhine-Westphalia, Dusseldorf, View of the waterfront Promenade from the Rheinturm or Rhine Tower which is the city's tallest building.

Energy, Power, Renewable, Solar panels on roof of canal barge to collect power for batteries.

Energy, Power, Renewable, Solar panels on roof of canal barge to collect power for batteries.

Ireland, County Sligo, Sligo, boats on a misty winter morning at Doorly Park.

Holland, Rotterdam, The Nieuwe Maas River with the De Rotterdam Building in the centre flanked by the KPN Telecom Tower building on the left and the New Orleans Tower on the right with tourists disemb...

Ireland, County Sligo, Sligo town, Doorly Park, Boat on the River Garavogue on a foggy winter's morning.

Ireland, County Sligo, Sligo town, Doorly Park, Boats on the River Garavogue on a foggy winter's morning.

England, London, The Tower of London and River Thames seen from the viewing deck on the Shard known as the View from the Shard.