A scuba diver surfacing and looking up into the light as he ascends from the bottom of Devil's Den, a sinkhole in Williston, Florda.

A Peninsula Cooter turtle (Pseudemys peninsularis) looking up and positioned on the sandy bottom of the Morrison Springs cavern at 80 feet deep in the fresh clearwaters of the State Park near Red Bay, Florida.

A Whitetip Reef Shark laying on the bottom in the sand and looking up at the above approaching photographer in the clear South Pacific ocean off Likuri Island, Fiji.

Young boy blowing up the bottom of a cow to increase the milk production, Mundari tribe, South Sudan, Africa

Young boy blowing up the bottom of a cow to increase the milk production, Mundari tribe, South Sudan, Africa

Young boy blowing up the bottom of a cow to increase the milk production, Mundari tribe, South Sudan, Africa

Young boy blowing up the bottom of a cow to increase the milk production, Mundari tribe, South Sudan, Africa

The summer Milky Way overhead and through the Summer Triangle stars in July, looking up through trees in Banff National Park at Herbert Lake. Deneb is at top left, Vega at top right, and Altair is at bottom. The bright Cygnus star cloud is obvious. As are the dark lanes in the Milky Way, including the Funnel Nebula at top, aka Le Gentil 3.

A horizon-to-zenith panorama of the winter consellations on a March evening as they set into the southwest. Orion is at bottom centre, with his Belt pointing down to Canis Major and up to Taurus. Gemini and Auriga are at top, in this case near the zenith overhead. The bright star clusters, M44, the Beehive, (at left) and M45, the Pleiades, (at right) flank the Milky Way. M45 is embedded in the Zodiacal Light. The star clusters M35 in Gemini and M41 in Canis Major are also visible as diffuse spots, as are several other star clusters. A couple of satellite trails are visible.

Hawaiian reef lobster, endemic, Enoplometopus occidentalis, Portlock, Oahu, Hawaii (N. Pacific)

Diver at Propeller of HIJMS Nagato Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Diver at Propeller of HIJMS Nagato Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Whitetip reef sharks (Triaenodon obesus) resting on rocks, San Benedicto Island, near Socorro, Revillagigedo Islands, archipelago, Mexico, eastern Pacific

Young fly agraric (Amanita muscaria), Hoernle, Ammergau Alps, Upper Bavaria, Germany, Europe

Poppy meadow with sun and shafts of sunlight, wide angle perspective from the bottom up

Forest with leaf litter in autumn, Kiel, Schleswig-Holstein, Deutschland

Porcelain Fungus (Oudemansiella mucida), Emsland, Lower Saxony, Germany, Europe

Man standing at cracked earth at the bottom dried up lake, Poland, Europe

A rider picking up his pole from the ground. Dornod Province, Mongolia, Asia

Sea Cow (Dugong dugon) or Dugong with Remorafish on its belly swims up to surface in blue water, school of Golden Trevally (Gnathanodon speciosus) fish accompany it, Bottom view, Red sea, Egypt, Africa

Sea Turtle with bite marks on fins swims in blue water. Close-up of Great Green Sea Turtle (Chelonia mydas) with its front flippers bitten off by a shark swimming slowly over seabed, Red sea, Egypt, Africa

Staircase with dome as seen the bottom, Schweriner Schloss castle, built from 1845 to 1857, romantic historicism, Lennestrasse 1, Schwerin, Mecklenburg-Western Pomerania, Germany, Europe

Scottish Highland Cattle with calf and grown up cow with scraggy brown fur lying on ground

Staircase from the bottom up, from the 1950's, Hamburg, Germany, Europe

Close-up of the edge of a hotel pool, Mallorca, Balearic Islands, Spain

A young woman stands in the bottom of a narrow, deep slot canyon looking up at the striated rock walls.

A young man stands in the bottom of a narrow, deep slot canyon looking up at the striated rock walls.

Close-up of purple starfish seen through crystal clear rippling water

Hawaii, Diver photographing a spotted porcupinefish (diodon hystrix), puffed up with spines sticking out.

Palau, Pair of nautilus shells. [For use up to 13x20 only]

Diver at Bow of USS Arkansas Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Endemic Anemonefishes at bottom up laying USS Arkansas Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Diver and Fire Coral at bottom up Wreck HIJMS Nagato Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Diver at massive 16-inch 45 Caliber Gun under the HIJMS Nagato Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Diver at massive 16-inch 45 Caliber Gun under the HIJMS Nagato Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Diver at massive 16-inch 45 Caliber Gun under the HIJMS Nagato Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Diver explores Wheels and Wreckage of HIJMS Nagato Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Diver between Rudder of bottom up laying HIJMS Nagato Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Diver at Propeller of HIJMS Nagato Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Diver at Propeller of HIJMS Nagato Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Diver at Propeller of HIJMS Nagato Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Diver discover Teapot inside of HIJMS Nagato Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Diving at japanese HIJMS Nagato Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean

Bridge of HIJMS Nagato Battleship, Marshall Islands, Bikini Atoll, Micronesia, Pacific Ocean