Philippe Clement / Traditional Royal Mail red mailbox in the countryside at Coigach, Ross and Cromarty, Scottish Highlands, Scotland, UK, September 2016.
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Merryn Thomas / Camping sign on the W Trek, Torres del Paine National Park, Patagonia, Chile. January.
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Merryn Thomas / Bano, toilet sign on the Inca Trail, Peru. December 2013.
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Kirkendall-Spring / Woman looking inside the mailbox on the summit of Mailbox Peak near North Bend, Washington, USA. March 2016. Model released.
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Kirkendall-Spring / Vehicle license plate, YNP WOLF, of a wolf watcher in Yellowstone National Park, Wyoming, USA.
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Nick Turner / Sign for Chedworth Roman Villa at Yanworth, Gloucestershire, UK. October.
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Nick Turner / Sign for Chedworth Roman Villa at Yanworth, Gloucestershire, UK. October 2015.
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Nick Turner / The village of Coln St.Dennis, Gloucestershire, UK. October 2015.
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Solvin Zankl / Bridegroom's Oak tree. Traditionally people seeking romantic partners would post a letter into the hole of this tree, which can be taken out and replied to by others, the postal service now also d...
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Chris Mattison / Two lichens on a headstone, Grab eye lichens (Ocrolechia parella) - pale grey, and Rusty shielded lichen (Caloplaca crenularia) Gower, South Wales, UK, June.
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Loic Poidevin / Little egrets (Egretta garzetta) flock perched on sheep, Extremadura, Spain, April.
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Enrique Lopez-Tapia / Sign and box for volcano post, the only known post box on an active volcano. Mount Yasur, Tanna Island, Vanuatu, September 2008.