Jack Dykinga / Rainbow over Long Canyon with fall coloured Cottonwood (Populus) trees against canyon walls, Burr Trail, Grand Staircase-Escalante National Monument, Utah, USA, October 2018.
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Guy Edwardes / Hawes, Wensleydale, Yorkshire Dales National Park, North Yorkshire, England, UK. June.
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Guy Edwardes / Dry-stone walls and barns in Wensleydale, Yorkshire Dales National Park, North Yorkshire, England, UK, June 2016.
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Jack Dykinga / Hoodoo cap sandstone rock formations with milky way above and meteor shower, Escalante canyon walls, Grand Staircase- Escalante National Monument , Utah, USA, October.
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Jack Dykinga / Navajo sandstone canyon walls eroded and sculpted by Paria River floods, Paria Canyon, Vermilion Cliffs National Monument, Arizona, USA.
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Juan Carlos Munoz / Eroded sandstone patterns on walls of Lower Canyon, Antelope Canyon, Page, Arizona, USA, February 2015.
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Juan Manuel Borrero / Vertical garden on the walls of a tower block, Barcelona. Catalonia. Spain, June 2013.
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Brent Stephenson / Stone cleats and circular dry-stone walls above the main settlement in Village Bay, Hirta. St Kilda, Outer Hebrides, Scotland. June.
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Alex Hyde / Drystone walls near Litton, Peak District National Park, Derbyshire, UK, May.
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Jabruson / 'Kith' / 'Kin' Sumatran orangutan (Pongo abelii) captive animal in walled enclosure, Perth Zoo, Western Australia, August 2001.
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Mark Taylor / Waves breaking against sea wall and cliffs, Seaford, Sussex, England, UK, 15th February 2014.
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David Tipling / House Martin (Delichon urbicum) leaving nest under eaves of house, Northumberland, UK, July
