Jouan & Rius / Gairdner lake, surface of dry salt lake, South Australia, Australia

Jouan & Rius / Gairdner lake, surface of dry salt lake, South Australia, Australia

Jouan & Rius / Looking down on Island Lagoon and the dry salt lake, South Australia

Robert Valentic / Lake Eyre dragon {Ctenophorus maculosus} male, inhabits featureless salt lakes in the arid zone, Lake Eyre, South Australia

Gertrud & Helmut Denzau / Eroyulanduz Salt Lake with pink algae, basalt chimney behind, Badkhyz, Turkmenistan

Jerry Monkman / American Avocet {Recurvirostra americana} male standing on one leg in a salt water pool, Antelope Island State Park, Great Salt Lake, Utah, USA

Theo Allofs / Hexagons in dry salt lake at sunset, Salar de Atacama, Chile

Theo Allofs / Salt lake Salar de Atacama, the largest salt lake in Chile

Jeff Rotman / Anemone (Actiniaria sp.) eating Mastigias Jellyfish (Mastigias sp.). Palau's Jellyfish Salt Lake, Palau Islands, Micronesia, Pacific Ocean.

Jeff Rotman / Mastigias Jellyfish (Mastigias sp.) swarm. Palau's Jellyfish Salt Lake, Palau Islands, Micronesia, Pacific Ocean.

Richard Du Toit / Patterns in alkaline salt crust on surface of Lake Natron, Tanzania

Jack Dykinga / Salt crystal formations in partially crystalised salty lake, Panamint Range in distance with dawn light reflected in water, Death Valley National Park, California

Jack Dykinga / Salt lake with crystalised patterns, Panamint Mountains in background, dawn, Death Valley National Park, California

Jack Dykinga / Salt lake with crystalised patterns, Panamint Mountains in background, dawn, Death Valley National Park, California

Richard Du Toit / Aerial view of Lake Natron, with surface patterns created by mineral deposits, Tanzania

Richard Du Toit / Aerial view of Lake Natron showing mineral deposits, Tanzania

Richard Du Toit / Aerial view of Sugata valley with mineral deposits, Lake Logipi, Great Rift Valley, Kenya

Richard Du Toit / Aerial view of salt works showing dark tyre tracks from vehicles, Lake Magadi, Kenya

Robert Fulton / Aerial view of Salar de Uyuni over salt lake, Bolivia, South America 2000

Robert Fulton / Aerial view of Salar de Uyuni over salt lake, Bolivia, South America 2000

Robert Fulton / Aerial view of Salar de Uyuni over salt lake, Bolivia, South America 2000

David Welling / Tufa towers and summer wavy grass on edge of Mona Lake NP, California, USA

Gertrud & Helmut Denzau / On the shores of Tsomoris Lake (salt lake), Ladakh, North East India

Adrian Davies / Tufa towers, Mono Lake, California, USA

Adrian Davies / Tufa towers, Mono Lake, California, USA

Adrian Davies / Tufa towers, Mono Lake, California, USA

Jabruson / Defassa waterbucks on soda flats, Lake Nakaru NP, Kenya

Jeff Rotman / Mastigias jellyfish {Mastigias sp} Jellyfish salt lake, Palau, Micronesia.

Jeff Rotman / Mastigias jellyfish {Mastigias sp} Jellyfish salt lake, Palau, Micronesia.

Marguerite Smits Van Oyen / Afar tribesmen mining salt, Lac Assal, Djibouti, East Africa. 150m below sea level. Sea water seeps through into lake and evaporates.

Marguerite Smits Van Oyen / Afar tribesmen mining salt, Lac Assal, Djibouti, East Africa. 150m below sea level. Sea water seeps through into lake and evaporates.

Gertrud & Helmut Denzau / Basalt chimney of volcano, after surrounding sediment has eroded. Eroyulanduz Salt Lake, Badkhyz, Turkmenistan

Gertrud & Helmut Denzau / Tsomoris Lake (salt lake) with snow-capped mountains in background, Ladakh, North East India

Daniel Gomez / Salt lake landscape, San Guillermo biosphere reserve, Central Andes, Argentina. 3500metres

John Cancalosi / Halite, commonly known as rock salt (NaCl, Sodium chloride) the mineral form of table salt, used for human consumption. Searles lake, California, USA

John Cancalosi / Halite (NaCl / Sodium chloride / Salt) crystals, from Searles lake, California, USA, An ore of salt used for human consumption

Tom Hugh-Jones / Steve Leonard on location in Lake Bogoria Kenya Africa