Philippe Clement / View over mountain range covered in mist at sunrise seen from the Col du Tourmalet, Pyrenees, France, June 2012

David Noton / The Col de Bavella at dawn, Corsica, France. June 2011.

David Noton / Rain clouds hanging over the Col de Bavella, Bavella Mountains, Corsica, France. June 2011.

Leo & Mandy Dickinson / View from North Col of Everest,Himalayas, Nepal

Paul Harcourt Davies / Musky saxifrage (Saxifraga exarata moschata). Col di Rodella, Fassa Valley, Dolomites, Italy. July.

Paul Harcourt Davies / Yellow whitlow grass (Draba aizoides). Col di Rodella, Dolomites, Trentino, Italy. June.

Paul Harcourt Davies / Musky saxifrage (Saxifraga exarata moschata) in rock crevice. Col di Rodella, Fassa Valley, Dolomites, Italy. July.

Paul Harcourt Davies / Musky saxifrage (Saxifraga exarata moschata). Col di Rodella, Fassa Valley, Dolomites, Italy. July.

Paul Harcourt Davies / Alpine bistort ( (Polygonum aviculare). Col di Rodlea, Campitello di Fassa, Dolomites, Trentino, Italy. June.

Paul Harcourt Davies / Alpine sainfoin (Hedysarum hedysaroides). Col Rodela, Dolomites, Trentino, Italy. June.

Paul Harcourt Davies / Alpine bistort ( (Polygonum aviculare). Col di Rodlea, Campitello di Fassa, Dolomites, Trentino, Italy. July.

Paul Harcourt Davies / Mountain thrift (Armeria alpina). Col Rodella, Dolemites, Trentino, Italy. June.

Paul Harcourt Davies / One-flowered fleabane (Erigeron uniflorus). Col di Rodella, Fassa Valley, Dolomites, Italy. June.

Paul Harcourt Davies / Rock speedwell (Veronica fruticans). Col Rodela, near Campitello di Fassa, Dolomites, Trentino, Italy. June.

Paul Harcourt Davies / Rock speedwell (Veronica fruticans) and Thyme (Thymus praecox). Col Rodela, near Campitello di Fassa, Dolomites, Trentino, Italy. June.

Paul Harcourt Davies / Mountain milk vetch (Oxytropis jacquinii). Col Rodela, near Campitello di Fassa, Dolomites, Trentino, Italy. June.

Paul Harcourt Davies / Sticky primrose (Primula glutinosa) in meadow at 2513m. Col Margherita, Passo San Pellegrino, Dolomites, Trentino, Italy. June.

Paul Harcourt Davies / Sticky primrose (Primula glutinosa) in meadow at 2513m. Col Margherita, Passo San Pellegrino, Dolomites, Trentino, Italy. June.

Paul Harcourt Davies / Woodland arctic cudweed (Omalotheca sylvatica) growing amongst rocks in Dolomites at 2400m. Col di Rodella, Fassa Valley, Trentino, Italy. July.

Paul Harcourt Davies / Oxlip (Primula elatior) in pasture with Alpine snowbell (Soldanella alpina) in background. Col di Rodella, Dolomites, Fassa Valley, Trentino, Italy. June 2019.

Paul Harcourt Davies / Oxlip (Primula elatior) in alpine pasture following snow melt, mountains in background. Col di Rodella, Fassa Valley, Dolomites, Trentino, Italy. June 2019.

Paul Harcourt Davies / Alpine wood forget-me-not (Myosotis alpestris) overlooking mountains. Col di Rodella, Fassa Valley, Dolomites, Trentino, Italy. June 2017.

Lorraine Bennery / Early coralroot (Corallorhiza trifida) - Racine de corail, Col du Prayet , Verdon Regional Natural Park, France, June.

Lorraine Bennery / Lady's slipper orchid (Cypripedium calceolus) Vercors Regional Park, Col du Prayet, Isere , France, May.

Lorraine Bennery / Three toothed orchid (Neotinea tridentata) on the left and with orchid (Ophrys drumana) Vercors Regional Park, Col du Prayet, Isere , France, May.

Lorraine Bennery / Lady's slipper orchid (Cypripedium calceolus) Vercors Regional Park, Col du Prayet, Isere , France, May.

Lorraine Bennery / Orchid (Ophrys demangei) Col Cavalli, Drome, Vercors Regional Park, France, June.

Lorraine Bennery / Orchid (Ophrys drumana) Col Cavalli, Drome, Vercors Regional Park, France, June.

Lorraine Bennery / Orchid (Listera cordata) Vercors Regional Park, Col du Prayet Isere , France, June.

Lorraine Bennery / Orchid (Dactylorhiza angustata) Col de la Colombiere, Haute-Savoie, France, June.

Lorraine Bennery / Natural hybrid between (Dactylorhiza fuchsii) and (Dactylorhiza sambucina) occasionally found where both species are present together, Col de la Colombiere, Haute-Savoie, France, June.

Lorraine Bennery / Orchid (Nigritella austriaca) , Col de la Colombiere, Haute-Savoie, France, June.

Lorraine Bennery / Orchid (Nigritella austriaca) , Col de la Colombiere, Haute-Savoie, France, June.

Robert Thompson / Alpine cattle on the Col de Tentes road, Pyrenees National Park, France, June.

Robert Thompson / View from the Col de Tentes road, Pyrenees National Park, France, June.

Robert Thompson / View from the Col de Tentes road, Pyrenees National Park, France, June.

Robert Thompson / View of the Col de Tentes, Pyrenees National Park, France, June 2019.

Robert Thompson / View at the head of the Col de Tentes. Pyrenees National Park, France, June.

Pascal Tordeux / Snow-covered woods after a snowstorm at Col de la Schucht, Vosges Mountains, France. January 2014.

Pascal Tordeux / Snow-covered woods after a snowstorm at Col de la Schucht, Vosges Mountains, France. January 2014.

Pascal Tordeux / Snow-covered woods after a snowstorm at Col de la Schucht, Vosges Mountains, France. January 2014.

Philippe Clement / Carriere royale de l'Espiadet marble quarry at Payolle, Haute-Bigorre, Hautes-Pyrenees, France. September 2018

Mike Read / Owlfly (Libelloides coccajus) resting on a grass stem, near the Col de Menee, Vercors Regional Natural Park, France, June

Mike Read / Owlfly (Libelloides coccajus) resting on a grass stem, near the Col de Menee, Vercors Regional Natural Park, France, June

Loic Poidevin / Lac du col grand Saint Bernard, Versant Italien, Valais, Switzerland, September.

Robert Thompson / Col de Mantet, North of Mamtet, French Pyrenees, France. May 2018.

Mike Read / Corsican pine (Pinus nigra laricio) with peaks of Aiguilles de Bavella in background. Col de Bavella, Corsica, France. July 2018

Guy Edwardes / View at dawn over Hautes-Alpes from Col de Perty, The Baronnies, Provence, France.. July 2016