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Manta ray (Manta birostris) feeding on zooplankton by extending its cephalic lobes, Yum Balam Marine Protected Area, Quintana Roo, Mexico, North America

Biologist taking skin sample from a whale shark to determine what plankton types the animal has been feeding on, Yum Balam Marine Protected Area, Quintana Roo, Mexico, North America

Scientist free diving to make a photo identification of an individual manta ray (Manta birostris), Yum Balam Marine Protected Area, Quintana Roo, Mexico, North America

Hikers break with Mount Foraker on the left and Mount Crosson on the right, in distance, Denali National Park, Alaska, United States of America, North America

Comarca de Kuna Yala, San Blas Islands, Panama, Central America

Avenue Balboa city skyline at night, Panama City, Panama, Central America

San Francisco de Asisi Church (Iglesia de San Francisco De Asis), Plaza Bolivar, Casco Viejo, Panama City, Panama, Central America

Gatun Lake, Panama Canal, Panama, Central America

Tourists snorkelling in front of Devil Island, Comarca de Kuna Yala, San Blas Islands, Panama, Central America

Men in dugout canoe near Devil Island, Comarca de Kuna Yala, San Blas Islands, Panama, Central America

Aerial view of city showing the old town of Casco Viejo also known as San Felipe and Panama Bay, Panama City, Panama, Central America

Gatun Lake near Panama Canal, Panama, Central America

Container ships in Gatun Locks, Panama Canal, Panama, Central America

Container ships on Gatun Lake heading for Gatun Locks, Panama Canal, Panama, Central America

Container ship transiting Panama Canal, Gatun Lake, Panama, Central America

Bridge of the Americas, Panama City, Panama, Central America

Kuanidup Grande, Comarca de Kuna Yala, San Blas Islands, Panama, Central America

Hammocks hanging between palm trees, Kuanidup Grande, Comarca de Kuna Yala, San Blas Islands, Panama, Central America

Kuanidup Grande, Comarca de Kuna Yala, San Blas Islands, Panama, Central America

Bridge of the Americas at sunset, Panama City, Panama, Central America

Tufa towers in Mono Lake at twilight, California, United States of America, North America

The Three Brothers reflected in the Merced River at dawn, Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Bristlecone Pine tree in the Ancient Bristlecone Pine Forest, California, United States of America, North America

Tufa towers in Mono Lake at twilight, California, United States of America, North America

Autumnal foliage on the shores of the Merced River in Yosemite Valley, California, United States of America, North America

Valley View of El Capitan from the Merced River, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Tranquil Silver Lake at dawn in the Eastern Sierra Mountains, California, United States of America, North America

Golden autumn foliage on the shores of Silver Lake in the Eastern Sierra Mountains, California, United States of America, North America

Sunset over a tranquil Mono Lake in autumn California, United States of America, North America

El Capitan and Half Dome at sunset, from Tunnel View, Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Twilight over Half Dome, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Black Oaks with spectacular autumnal colours in Yosemite Valley, UNESCO World Heritage Site, California, United States of America, North America

Autumn foliage reflected in the Merced River, Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Yosemite Chapel surrounded by fall foliage, Yosemite Valley, California, United States of America, North America

Mono Lake tufa towers at sunset in autumn, California, United States of America, North America

Frosty autumn morning on June Lake Loop in the Eastern Sierra Mountains, California, United States of America, North America

Clouds Rest mountain in the High Sierras in autumn, viewed from above Olmstead Point, Yosemite, California, United States of America, North America

Ancient pine tree growing on the mountains above Olmstead Point, Yosemite, California, United States of America, North America

Tranquil evening tones at Tenaya Lake, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Half Dome and fall foliage reflected in the Merced River, Yosemite Valley, Yosemiite National Park, UNESCO World Heritage Site, California, United States of America, North America

The Three Brothers reflected in the Merced River, Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Giant Sequoia trees (Sequoiadendron giganteum) in Mariposa Grove, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Evening sun setting on El Capitan above the Merced River, Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Sunrise at Convict Lake in the Eastern Sierra Mountains in autumn, California, United States of America, North America

Autumn scenery near the Merced River in Yosemite Valley, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Early morning sunshine lights the Eastern Sierra Mountains beyond Convict Lake, California, United States of America, North America

Half Dome and Clouds Rest mountains from above Olmstead Point in autumn, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Jeffery Pine at Olmstead Point in autumn, Yosemite National Park, UNESCO World Heritage Site, California, United States of America, North America

Window adorned for Holy Week Procession, Antigua, Guatemala, Central America

Embroidered textile, Santiago Atitlan, Lake Atitlan, Guatemala, Central America

Detail of a Stela, Mayan archaeological site, Tikal, UNESCO World Heritage Site, Guatemala, Central America

Jaques Cartier Place, Montreal, Quebec, Canada, North America

Rue du Petit-Champlain in the lower city, Quebec City, Quebec, Canada, North America

Hotel Chateau Frontenac, Quebec City, Quebec, Canada, North America

Montmorency Falls, located 10 kms east of Quebec City, Quebec, Canada, North America

Colored candles, Antigua, Guatemala, Central America

Devotee in St. Thomas church, Chichicastenango, Guatemala, Central America

El Senor Maximon worship, Solola, Guatemala, Central America

A snorkeler with a large school of bigeye trevally (Caranx sexfasciatus) in deep water near Cabo Pulmo, Baja California Sur, Mexico, North America

Star Beach, Colon Island (Isla Colon), Bocas del Toro Province, Panama, Central America

Carenero Island (Isla Carenero), Bocas del Toro Province, Panama, Central America

Galapagos dove (Zenaida galapagoensis), Genovesa Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Galapagos blue-footed booby (Sula nebouxii excisa), North Seymour Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Waves breaking on the coast of Puerto Egas, Santiago Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Red footed booby (Sula sula) in red mangrove, Genovesa Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Warbler finch (Certhidea olivacea), Genovesa Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Galapagos blue-footed booby (Sula nebouxii excisa), North Seymour Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Galapagos brown pelican (Pelecanus occidentalis urinator), Genovesa Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Waved albatross (Phoebastria irrorata ), Hispanola Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Galapagos Brown Pelican (Pelecanus occidentalis urinator) in flight, Black Turtle Bay, Santa Cruz Island, Galapagos, Ecuador, South America

Sally Lightfoot crab (Grapsus grapsus), Galapagos, Ecuador, South America

Nazca booby (Sula granti), Hispanola Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Waved albatross (Phoebastria irrorata ) in flight, Hispanola Island, Galapagos, Ecuador, South America

Lava gull (Leucophaeus fuliginosus), Genovesa Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Galapagos Lava Lizard (Microlophus albemarlensis), Hispanola Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Galapagos sea lion pup (Zalophus californianus wollebaeki), Galapagos, UNESCO World Heritage Site, Ecuador, South America

Nazca booby (Sula granti), Hispanola Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Walrus (Odobenus rosmarinus) close-up of face, tusks and vibrissae (whiskers), hauled out on pack ice to rest and sunbathe, Nunavut, Canada, North America

Traditonal Mola, Isla Tigre, San Blas Islands, Comarca de Kuna Yala, Panama, Central America

Walrus (Odobenus rosmarus) hauled out on pack ice to rest and sunbathe, Foxe Basin, Nunavut, Canada, North America

Walrus (Odobenus rosmarinus) females with baby hauled out on pack ice to rest and sunbathe, Foxe Basin, Nunavut, Canada, North America

Inca ruins, Machu Picchu, UNESCO World Heritage Site, Peru, South America

Mission San Xavier del Bac, Tucson, Arizona, United States of America, North America

Two walrus (Odobenus rosmarinus,) close-up of face, tusks, and vibrissae (whiskers), hauled out on pack ice to rest and sunbathe, Foxe Basin, Nunavut, Canada, North America