Konrad Wothe / Palm trees growing along white sand beach, Insumbabi Island, northwest Irian Jaya, Indonesia

Michael & Patricia Fogden / Dancing White Lady Spider (Leucorchestris arenicola) eating a Dune Cricket, Namib Desert, Namibia

Flip Nicklin / Sandbar Shark (Carcharhinus plumbeus) underwater portrait, bottom-dwelling coastal species, worldwide distribution

Flip Nicklin / Sandbar Shark (Carcharhinus plumbeus) underwater portrait, bottom-dwelling coastal species, worldwide distribution

Flip Nicklin / Sandbar Shark (Carcharhinus plumbeus) underwater portrait, bottom-dwelling coastal species, worldwide distribution

Yva Momatiuk & John Eastcott / Gypsum sand dunes in the evening light, patterns and ridges caused by wind, White Sands National Park, New Mexico

Yva Momatiuk & John Eastcott / Gypsum sand dunes in the morning light, patterns and ridges caused by wind, White Sands National Park, New Mexico

Yva Momatiuk & John Eastcott / Gypsum sand dunes in the evening light, patterns and ridges caused by wind, White Sands National Park, New Mexico

Yva Momatiuk & John Eastcott / Gypsum sand dunes in the evening light, patterns and ridges caused by wind, White Sands National Park, New Mexico

Yva Momatiuk & John Eastcott / Sand dunes of fine gypsum particles textured by wind and hiker's footprints, changing winds form cross-grooves, evening, White Sands National Park, New Mexico

Yva Momatiuk & John Eastcott / Sand dunes of fine gypsum particles textured by wind, changing winds form cross-grooves, evening, White Sands National Park, New Mexico

Konrad Wothe / Coral reef in lagoon surrounded by white sand beaches and palm trees, Rani Island, Irian Jaya, Indonesia

Yva Momatiuk & John Eastcott / Soaptree Yucca (Yucca elata) growing in gypsum sand dunes, White Sands National Park, New Mexico

Yva Momatiuk & John Eastcott / Gypsum sand dunes in the morning light, patterns and ridges caused by wind, White Sands National Park, New Mexico

Michael & Patricia Fogden / Lesser Earless Lizard (Holbrookia maculata) camouflaged against white sand, White Sands National Park, New Mexico

Michael & Patricia Fogden / Lesser Earless Lizard (Holbrookia maculata) camouflaged against white sand, White Sands National Park, New Mexico

Tim Fitzharris / Sand Verbena (Abronia sp) and primrose blooming, Anza-Borrego Desert State Park, California

Yva Momatiuk & John Eastcott / Sand dunes, White Sands National Park, New Mexico

Mike Parry / Oceanic White-tip Shark (Carcharhinus longimanus) portrait, Hawaii

Mike Parry / Oceanic White-tip Shark (Carcharhinus longimanus) with symbiotic Pilot Fish (Naucrates ductor), Hawaii

Mike Parry / Oceanic White-tip Shark (Carcharhinus longimanus) with symbiotic Pilot Fish (Naucrates ductor), Hawaii

Gerry Ellis / White sand beach surrounding lagoon, Two People's Bay National Park, Western Australia

Michael & Patricia Fogden / Skunkbrush Sumac (Rhus trilobata) among white sand, White Sands National Park, New Mexico

Chris Newbert / Oceanic White-tip Shark (Carcharhinus longimanus) close to surface, Hawaii

Michael & Patricia Fogden / Soaptree Yucca (Yucca elata) flowering on gypsum dunes, White Sands National Park, New Mexico

Hiroya Minakuchi / Oceanic White-tip Shark (Carcharhinus longimanus) with symbiotic Pilot Fish (Naucrates ductor), Hawaii

Gerry Ellis / Coconut Palm (Cocos nucifera) trees along a white sand beach, Samana Peninsula, Dominican Republic

Norbert Wu / Oceanic White-tip Shark (Carcharhinus longimanus) with symbiotic Pilot Fish (Naucrates ductor), Hawaii

Norbert Wu / Oceanic White-tip Shark (Carcharhinus longimanus) pair with symbiotic Pilot Fish (Naucrates ductor), Hawaii

Jim Brandenburg / White sand beach ringed with palm trees overlooks bay filled with sailboats, Jost Van Dyke, British Virgin Islands, Caribbean

Mitsuaki Iwago / Masked Booby (Sula dactylatra) parent with chick on white sand beach, Hawaiian Leeward Islands, Hawaii

Norbert Wu / Oceanic White-tip Shark (Carcharhinus longimanus) hooked on long-line, threatened by overfishing to supply high demand for fins and flesh, Baja California, Mexico

Norbert Wu / White sand and shallow water in inner lagoon, Grand Cayman, Caribbean

Fred Bavendam / Whitemargin Stargazer (Uranoscopus sulphureus) lying buried in the sand waiting for prey, Lembeh Strait, Indonesia

Adam White / Coral atoll - Alphonse from the air, Seychelles

Elizabeth White / Burrowing land crab in sand, Ningaloo Marine Park, Western Australia

Thomas Lazar / Shadows on white sand from fence preventing sand dune erosion. Gulf Is NS, Florida USA

Adam White / Giant tortoise {Geochelone elephantopus} on shore after swimming, Aldabra, Seychelles

Tim Fitzharris / Sand dune, White Sands National Park, New Mexico

Norbert Wu / Oceanic White-tip Shark (Carcharhinus longimanus), Bahamas, Caribbean

Norbert Wu / Oceanic White-tip Shark (Carcharhinus longimanus), Bahamas, Caribbean

Norbert Wu / Oceanic White-tip Shark (Carcharhinus longimanus), Bahamas, Caribbean

Tom Vezo / Evening Primrose (Oenothera sp) flowers in desert, Joshua Tree National Park, California

Onne van der Wal / Naturally carved granite boulders line the shore of a white sandy beach with footprints in the sand, Seychelles, Indian Ocean.

Roberto Rinaldi / Bitter End Yacht Club, Virgin Gorda Island. The yacht club is on accessible by sea and situated on a mile-long, white coral-sand beach on the picturesque North Sound, British Virgin Islands, (BVI).

Roberto Rinaldi / Bitter End Yacht Club, Virgin Gorda Island. The yacht club is on accessible by sea and situated on a mile-long, white coral-sand beach on the picturesque North Sound, British Virgin Islands, (BVI)

Roberto Rinaldi / Bitter End Yacht Club, Virgin Gorda Island. The yacht club is on accessible by sea and situated on a mile-long, white coral-sand beach on the picturesque North Sound, British Virgin Islands, (BVI).

Roberto Rinaldi / Bitter End Yacht Club, Virgin Gorda Island, British Virgin Islands, (BVI). ^^^The yacht club is on accessible by sea and situated on a mile-long, white coral-sand beach on the picturesque North Sound.

Roberto Rinaldi / White sandy beach surrounded by clear water, Maldives.

Yva Momatiuk & John Eastcott / White sand dunes, Western Australia, Australia

Yva Momatiuk & John Eastcott / White sand dunes, Western Australia, Australia

Roberto Rinaldi / White sand beach with clear water, palm trees and sun loungers, Maldives.

Roberto Rinaldi / Woman walking on white sand surrounded by clear waters, Lankayan Island, Sabah, Borneo. Model released.

Roberto Rinaldi / Island with white sand and palm trees, Maldives.

Roberto Rinaldi / White sandy beach surrounded by clear water, Maldives.

Roberto Rinaldi / Island with white sand and palm trees, surrounded by clear waters, Maldives.

Roberto Rinaldi / Island with white sand and palm trees, surrounded by clear waters, Maldives.

Yva Momatiuk & John Eastcott / Man hiker wearing shorts, a hat and a backpack, 52, walking alone in a big sprawling landscape of sand and distant mountains, across white sand dunes, evening, autumn, White Sands National Park, New M...

Mitsuaki Iwago / Blue Wildebeest (Connochaetes taurinus) herd walking across sand, Serengeti

Flip Nicklin / Sandbar Shark (Carcharhinus plumbeus) underwater portrait, bottom-dwelling coastal species, worldwide distribution

PAULA COULTER / Dunes at dusk at White Sands National Monument New Mexico US

Yva Momatiuk & John Eastcott / Sand dunes of fine gypsum particles textured by wind and hiker's footprints, changing winds form cross-grooves, evening, White Sands National Park, New Mexico

Yva Momatiuk & John Eastcott / Young hikers, reading and resting among sand dunes, White Sands National Park, New Mexico

Mike Parry / Oceanic White-tip Shark (Carcharhinus longimanus) portrait, Hawaii

Mike Parry / Oceanic White-tip Shark (Carcharhinus longimanus) with symbiotic Pilot Fish (Naucrates ductor), Hawaii

Mike Parry / Oceanic White-tip Shark (Carcharhinus longimanus) with symbiotic Pilot Fish (Naucrates ductor), Hawaii

Hiroya Minakuchi / Oceanic White-tip Shark (Carcharhinus longimanus) with symbiotic Pilot Fish (Naucrates ductor), Hawaii

Adam White / Coconut / Robber crab {Birgus latro} eating coconut at night on beach, Assumption, Seychelles

PAULA COULTER / Sand pedestal covered with vegetation White Sands NM New Mexico USA