Alan Williams / Beaver Bridge over River Conwy, near Betws-y-Coed, Snowdonia National Park, North Wales, UK, September 2018

Terry Whittaker / Menai Strait and Telford suspension bridge. Isle of Anglesey, Wales, October 2018.

Tim Fitzharris / Rock arch, Atuh Beach, Nusa Penida, Bali, Indonesia

Oscar Dewhurst / Black-legged kittiwake (Rissa tridactyla) adult perched on the side of the Tyne Bridge, overlooking Newcastle and the Tyne. Newcastle, UK. July

Oscar Dewhurst / Black-legged kittiwake (Rissa tridactyla) adults and chicks on nests on the Tyne Bridge. Newcastle, UK. July.

Guy Edwardes / River Garry and Pass of Killiecrankie from Garry Bridge, Perthshire, Scotland, UK. October, 2013.

Gavin Hellier / Timelapse of traffic crossing Tower Bridge, London, England,UK, May 2016. Hellier

Konrad Wothe / Creek with suspension bridge in rainforest, Baeza, northern Ecuador

Ross Hoddinott / Shaugh Prior, bridge and River Plym, Dartmoor National Park, Devon, UK. September 2016.

Solvin Zankl / Honey bees (Apis mellifera) forming living bridge, Kiel, Germany, June.

Solvin Zankl / Honey bees (Apis mellifera) forming living bridge, Kiel, Germany, June.

Solvin Zankl / Honey bee (Apis mellifera), bees can link up to form a bridge, however in this image the bridge has just collapsed leaving just three bees linked. Kiel, Germany, June.