England, London, Tower Bridge viewed from the south bank of the River Thames with an iconic red London bus crossing the bridge.

England, London, Tower Bridge viewed from the south bank of the River Thames.

England, London, Tower Bridge viewed from the south bank of the River Thames with an iconic red London bus crossing the bridge.

England, London, Tower Bridge in evening light viewed from the south bank of the River Thames with an iconic red London bus crossing the bridge.

Hungary, Budapest, Szechenyi Chain Bridge across the River Danube with St Stephens Basilica as seen from Castle Hill.

Hungary, Budapest, Szechenyi Chain Bridge across the River Danube with St Stephens Basilica as seen from Castle Hill.

Hungary, Budapest, View across the River Danube to the Hungarian Parliament Building from Castle Hill with the Chain Bridge in the foreground.

Wales, Conwy, Conwy Suspension Bridge with figure walking towards the walls of Conwy Castle.

Scotland, Edinburgh, Forth Road Bridge, South Queensferry.

Scotland, Edinburgh, Forth Road Bridge, South Queensferry.

Scotland, Edinburgh, Forth Road Bridge, South Queensferry.

Scotland, Edinburgh, Forth Road Bridge, South Queensferry.