Philippe Clement / Group of Alpine ibex (Capra ibex) climbing a cliff face, with others fighting above them, Gran Paradiso National Park, Graian Alps, Italy, June.

Philippe Clement / Three male Alpine ibex (Capra ibex) climbing up a steep mountain rock face, one pushes another one away, Gran Paradiso National Park, Graian Alps, Italy, June.

Philippe Clement / Two male Alpine ibex (Capra ibex) fighting on a steep mountain rock face, Gran Paradiso National Park, Graian Alps, Italy, June.

Ingo Arndt / Mount Rushmore National Memorial, South Dakota, USA, September 2009

Ingo Arndt / Seabird colony nesting on cliff face, Lange Anna, Helgoland, Germany

Andres M. Dominguez / Razorbills (Alca torda) group of three on cliff face, Farne Islands, Northumberland, England, UK, June.

Erlend Haarberg / Rock face reflected in lake surface with floating blue ice sheets, Ovre Pikhaugvatnet lake, Glomdalen valley, Saltfjellet-Svartisen National Park, Norway, August 2015.

Sumio Harada / Bighorn Sheep (Ovis canadensis) rams and a female on snowy cliff face, Glacier National Park, Montana

Chris & Monique Fallows / Orca (Orcinus orca) pod hunting common dolphin (Delphinus delphis) False Bay, South Africa.

Jack Dykinga / Cibecue Creek waterfall pouring through canyon narrows, White Mountain Apache Reservation, Arizona, USA

Roy Mangersnes / Person stretching after waking up on the Pulpit Rock, 604 meters above the Lysefjorden, Rogaland, Norway, Scandinavia, Model released

Roy Mangersnes / Person standing on Pulpit Rock, 604 meters above the Lysefjorden covered in mist, Rogaland, Norway