Juan Carlos Munoz / Tourists hiking along dirt track, Triglav National Park, Julian Alps, Slovenia, October 2010.

Orsolya Haarberg / High angle view of person walking on frozen lake of cracked ice. Lofoten Isands, Norway. January. Highly commended in the Landscape Category of the Oasis Photography Competition 2017. Highly commended...

Ole Jorgen Liodden / Man resting by tree with small fire, with Northern Lights in the sky above, Valdres, Norway, January 2005.

Kirkendall-Spring / Hikers on the trail to Three Fingered Jack, Mount Jefferson Wilderness, Duschutes National Forest. Oregon, USA, July 2014. Model released.

Steven Kazlowski / Photographer in front of Northern lights / Aurora borealis glowing brightly over the frozen eastern Beaufort Sea, Arctic National Wildlife Refuge, Alaska Model released.

Alex Mustard / A fisherman swims down to touch the statue of Christ Of The Abyss (Cristo degli abissi) for good fortune, in the Marine Protected Area of Portofino (Area Marina Protetta, Portofino), Liguria, Italy. M...

Alex Mustard / A diver explores Nikulasargj Canyona deep fault filled with fresh water in the rift valley between the Eurasian and American tectonic plates at Thingvellir National Park, Iceland. May 2011. In this ph...

Merryn Thomas / Man taking a photograph of Three Cliffs Bay, Gower, Swansea, Wales. January 2013. Model released.

Franco Banfi / Diver with rebreather inside sea cage used for aquaculture with thousand of Gilt-head bream (Sparus aurata) Ponza Island, Italy, Tyrrhenian Sea, Mediterranean. Model released.

Franco Banfi / Scuba diver under ice, Sassolo lake, Sambuco valley, Ticino, Switzerland. Model released.

Franco Banfi / Scuba diver under ice and ice formation, Arctic circle Dive Center, White Sea, Karelia, northern Russia March 2010. No release available.

Peter Cairns / Woman standing in front of Skogafoss waterfall, Iceland. Model released.

Jeff Rotman / Child snorkeling and exploring on coral reef wall. Red Sea, Egypt. Model released Model released.

Jeff Rotman / Looking down on the shipwreck of the small freighter 'Ora Verde' that sank in 1980, Grand Cayman Island, Caribbean Sea Model released.

Juergen Freund / Split level of snorkeler over coral reef on white sandy seabed contrasting with dry topside landscape in background, Komodo NP, Indonesia, August 2009. Model released.

Juergen Freund / Snorkeler swimming through a school of Oxeye scads (Selar boops) in the house reef of Miniloc Island Resort, El Nido island, Palawan, Philippines, May 2009. Model released.

Guy Edwardes / Two people silhouetted in front of Skogafoss waterfall in southern Iceland, June 2009

Kirkendall-Spring / Cathedral Peak from Middle Lake, Popo Agie Wilderness, Wind River Range, Shoshone National Forest, Wyoming, USA. September 2015. Model released.

Kirkendall-Spring / Cathedral Peak from Middle Lake, Popo Agie Wilderness, Wind River Range, Shoshone National Forest, Wyoming, USA. September 2015. Model released.

Peter Cairns / Photographer with tripod on edge of Godafoss warterfall, frozen in winter, Iceland, February 2014.

Peter Cairns / Photographer with tripod on edge of Godafoss warterfall, frozen in winter, Iceland, February 2014.

Daniel Heuclin / Navajo man riding horse in front of rock formations of Monument Valley, Utah, USA, May 2014.

Olga Kamenskaya / Diver exploring underwater landscape of Lake Baikal, Russia, December 2008.

Olga Kamenskaya / Diver exploring crack in ice under the surface, Lake Baikal, Russia, April 2013. Model released.

Inaki Relanzon / Photographer taking photos of rock formations, silhouetted at sunset on the Pacific coast of Olympic National Park, Washington State, USA. Model released.

Sergey Gorshkov / Man standing next to ice covered rock stack for scale, Wrangel Island, Far Eastern Russia, March 2011.

Nick Garbutt / Tourist looking at Iguazu Falls by moonlight on the Iguasu River, Brazil / Argentina border. Photographed from the Brazilian side of the Falls. State of Parana, Brazil.

Erlend Haarberg / Photographer by the Haifoss waterfall with a rainbow in the spray, Iceland, August 2010

Bryan and Cherry Alexander / Tourists in a zodiac watching a waterfall tumble from the top of a glacier. Spitsbergen, Svalbard, Norway, June 2006.

Floris van Breugel / A hiker walking through impressive structures found in Death Valley's Fall canyon, California, USA, January 2010.

Bryan and Cherry Alexander / Tiny figure by Dettifoss, the most powerful waterfall in Europe. Iceland, 1992.

Jouan & Rius / Ornithologist watching Gannet colony, Hermaness Nature Resserve, Shetland Islands, Scotland, UK

Inaki Relanzon / Person watching Gulfoss waterfall, Iceland

Jean E. Roche / Hiker at Carbet waterfall, Basse-Terre, Guadeloupe, Caribbean 2000.

David Fleetham / Freediver swimming with Atlantic bottlenose dolphins (Tursiops truncatus) and Atlantic spotted dolphins (Stenella frontalis / plagiodon), Bahamas Bank, Caribbean.