13623147 - Father and son kayaking on river13623123 - Father and son kayaking on river13623117 - Father and son kayaking on river13623111 - Father and son kayaking on river13623024 - Happy father and son waving from kayak on river13623019 - Happy father and son kayaking on river13620763 - Limestone blockstone placed in river13620758 - Orange iron oxide staining in stream, River Neath, Wales13620757 - Orange iron oxide staining in stream, River Neath, Wales13620756 - Sample from polluted stream water in a cuvette13620755 - Brown and turbid unreacted sample of polluted stream water13620754 - Phosphate checker13620745 - Sewage fungus growing in polluted stream13620742 - Silt pollution13620741 - Hard engineering works to protect A40, River Towy, Wales13620740 - Orange iron oxide staining in stream, aerial photograph13620739 - Orange iron oxide staining in stream, aerial photograph13620718 - Freshwater water shrimp13620717 - Freshwater water shrimp13620421 - Ohio River flood wall, Paducah, Kentucky, USA13614074 - Oil drilling rig on the Pecos River, USA, aerial photograph13614073 - Oil drilling rig on the Pecos River, USA, aerial photograph13613891 - Veterans Glass City Skyway bridge over the Maumee River, USA13613888 - Sunflower mural on grain silos13613884 - Sunflower mural on grain silos13613883 - Sunflower mural on grain silos, Toledo, Ohio, USA13613355 - Wooden covered bridge over the River Aaere, Switzerland13600915 - Detroit panorama13600912 - Detroit skyline from Canada13600909 - Detroit skyline from Canada13600670 - River Danube panorama, Budapest13600664 - Hungarian Parliament Building, Budapest13600663 - Szechenyi Chain Bridge in Budapest13600662 - River Danube panorama, Budapest13600661 - Liberty Bridge, Budapest13600653 - Liberty Bridge in Budapest13600651 - Buda Castle, Budapest13600581 - Devorgilla Bridge, Dumfries13600437 - Chain of Rocks Bridge across Mississippi13600414 - Ambassador Bridge13600223 - Smoky Sunset over the Bow Valley, Alberta, Canada13600222 - Smoky Sunset over the Bow Valley, Alberta, Canada13600112 - Niagara Falls panorama13600103 - Himalayan mountains from the air13600102 - Niagara rapids, Canada13600087 - Horseshoe Falls panorama13600080 - Niagara Whirlpool, Canada13600077 - American Falls from Canada13600076 - Horseshoe Falls from Canada13599849 - Milky Way over Blakiston Creek, Alberta, Canada13599848 - Summer Milky Way13599847 - Milky Way over Elbow Falls, Alberta, Canada13599820 - Jupiter and Saturn in twilight13599810 - Jupiter, Saturn and the Milky Way13586621 - Women sunbathing by a pool, illustration13586480 - Brook in a fruit grove, illustration13586242 - New York City, USA, conceptual illustration13585766 - Underwater view of The Gardens of Ninfa, Italy13585744 - Sea lamprey13585728 - Two pink dolphins in Rio Negro, Brazil13585717 - Chum salmons in Granite Bay, British Columbia, Canada13585529 - Windsor riverfront, Ontario, Canada13585526 - Detroit and the Detroit River, Michigan, USA13585525 - Detroit and the Detroit River, Michigan, USA13585524 - Allegheny Reservoir, Warren, Pennsylvania, USA13585523 - Kinzua Dam, Warren, Pennsylvania, USA13585522 - Kinzua Dam, Warren, Pennsylvania, USA13585521 - Kinzua Dam, Warren, Pennsylvania, USA13585496 - Frederick Douglass Memorial Bridge, Washington, D.C., USA13585495 - Frederick Douglass Memorial Bridge, Washington, D.C., USA13585494 - Frederick Douglass Memorial Bridge, Washington, D.C., USA13585470 - Volunteers collecting trash along Anacostia River, USA13585469 - Volunteers collecting trash along Anacostia River, USA13526422 - Vehicle crossing bridge, aerial view13525532 - Common water crowfoot (Ranunculus aquatilis)13525441 - Annual ice loss compared with London, UK, illustration13525440 - Annual ice loss compared with London, UK, illustration13525437 - Annual ice loss compared with London, UK, illustration13525003 - Mute swans on river13524933 - Ice formations13524667 - New York power station13524660 - New York power station13524655 - New York power station13524654 - New York power station13524647 - New York power station and Empire State13524646 - Historic New York sugar factory13524634 - New York river barge13524132 - Flood barrier in Appleby13524127 - River Eden flooding at Appleby13524108 - Rubbish in Docklands13524067 - Flood defences in Appleby13524054 - Flood defences in Appleby13524034 - Flood defences at Appleby swimming pool13523515 - Lion hiding in tall grass13523511 - Lion resting on a river bank13513371 - Happy young female friends riding bicycles on urban bridge13513368 - Young female friends riding bicycles on urban bridge13513365 - Young woman with headphones using smartphone13513361 - Happy young female friends riding bicycles in citypage suivante