Wide angle view of Glen Canyon Dam from the wavy sandstone mesa of an area called the Chains, Arizona, United States of America, North America

Aerial view of Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. Red lagoon near Boca Paila Bridge. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Aerial view of Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. Red lagoon near Boca Paila Bridge. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Aerial view of Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. Red lagoon near Boca Paila Bridge. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Aerial view of Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. Red lagoon near Boca Paila Bridge. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Palms and old pier in Punta Allen Sian Ka'an Reserve, Yucatan Peninsula, Mexico. In the language of the Mayan peoples who once inhabited this region, Sian Ka'an means Origin of the Sky. Located on the east coast of the Yucatán peninsula, this biosphere reserve contains tropical forests, mangroves and marshes, as well as a large marine section intersected by a barrier reef. It provides a habitat for a remarkably rich flora and a fauna comprising more than 300 species of birds, as well as a large number of the region's characteristic terrestrial vertebrates, which cohabit in the diverse environment formed by its complex hydrological system. Along its roughly 120 kilometres of coastline, the property covers over 400,000 hectares of land ranging from sea level to only ten m.a.s.l. The property boasts diverse tropical forests, palm savannah, one of the most pristine wetlands in the region, lagoons, extensive mangrove stands, as well as sandy beaches and dunes. The 120,000 hectares of marine area protect a valuable part of the Mesoamerican Barrier Reef and seagrass beds in the shallow bays. The lush green of the forests and the many shades of blue of the lagoons and the Caribbean Sea under a wide sky offer fascinating visual impressions.

Tourists riding camels, in Timanfaya National Park, Lanzarote, Canary Islands, Spain

Echadero de Camellos, Camels wait for the next ride with tourists, Timanfaya National Park, Ruta de Los Volcanes, Lanzarote, Spain

Desert Erg Iguidi, Algeria, True Colour Satellite Image. True colour satellite image of Erg Iguidi, a sand desert between Algeria and Mauritania. The 250m wide dunes lay in the South on a sand plain, and in the North on a blakek sandstone area. The light blue areas are calcareous and salt crusts left out from the evaporation of the oueds' water. Image taken on 29 March 1987 using LANDSAT data.

Cattle Farm

Mother and Baby Rhinoceros Walking

360° view from Seekarlscharte Mountain with Gruba Lake and bizarre clouds in the sky over the Rofan Mountains, Achensee, Tyrol, Austria, Europe

Hikers at the Latemar crossing, fixed rope route, Rosengarten group at back, Dolomites mountain range, South Tyrol, Italy, Europe

The Schafbergbahn, cog railway on the Schafberg Mountain, in front of Wolfgangsee Lake, Salzburg, Austria, Europe

Clouds with snowy mountains in the Aletsch area, Goms, Valais, Switzerland

Big Aletsch glacier in front of snowy mountains in the Aletsch area, Goms, Valais, Switzerland

Volcano, Porto di Levante, view of Vulcanello, aerial view, Lipari Island (back), Aeolian Islands, Sicily, Italy

Horta on Faial Island, Azores, Portugal

Panoramic view, town of St. Wolfang am Wolfgangsee, Salzkammergut area, Upper Austria, Austria, Europe

View from Mount Wank, night shot, Garmisch-Partenkirchen's town lights, Wetterstein Range, Werdenfels, Upper Bavaria, Bavaria, Germany

Parador Hotel, Parador De Ronda, in the historic city centre on a rock plateau in the Serrania de Ronda, at the front a bridge over the River Tajo, Ronda, Andalusia, Spain, Europe

Aerial picture, logistics centre of IKEA Europe, Ellinghausen, Dortmund, Ruhr area, North Rhine-Westphalia, Germany, Europe

Porthcurno Beach, Pedn Vounder Beach, Logan Rock, South Coast, Cornwall, England, United Kingdom, Europe

Seiser Alm mountain pasture with Mt. Sciliar in autumn, Dolomites, South Tyrol, Italy, Europe

Perito Moreno Glacier with cloud formation, Patagonia, Argentina, South America

Perito Moreno Glacier with cloud formation, Patagonia, Argentina, South America

Gulf of Calvi, Balagne, West Corsica, Corsica, France, Europe

Headland where the North Sea and the Baltic Sea meet, container ships at back, Skagen, Jutland, Denmark, Europe

Aerial view, new construction of a power plant, building freeze, EON Datteln4 power plant, coal power station, Dortmund-Ems Canal, Datteln, Ruhrgebiet area, North Rhine-Westphalia, Germany, Europe

Aerial view, Kamener Kreuz, a cloverleaf interchange, motorway junction, A1 motorway, A2 motorway, Hansalinie motorway, Kamen, Ruhrgebiet area, North Rhine-Westphalia, Germany, Europe

Aerial view, new construction of a power plant, building freeze, EON Datteln4 power plant, coal power station, Dortmund-Ems Canal, Datteln, Ruhrgebiet area, North Rhine-Westphalia, Germany, Europe

Stonewall at the coast of San Antao, sunset, Cabo Verde, Cape Verde, Africa

La Fourchette, the fork, sculpture created by Jean-Pierre Zaugg, located in front of the Alimentarium Museum, Vevey, Lake Geneva, canton of Vaud, Switzerland, Europe

Sandstone cliffs of Cap Blanc, Nouadhibou, Mauritania, northwestern Africa

Sunset Lake, geyser, drainage area with a boardwalk, coloured thermophilic bacteria, microorganisms, Black Sand Basin, Upper Geyser Basin, Yellowstone National Park, Wyoming, United States of America, USA

Limone on Lake Garda, Lombardy, Italy, Europe

View of Mt. Piton de Neige in the Salazie volcano crater, blooming heather at front, La Reunion island, Indian Ocean

Ice falling off Garibaldi Glacier, Darwin National Park, Tierra del Fuego, Patagonia, Chile, South America

360 degree mountain panorama in the Wettersteingebirge mountains, Mt. Suedwand on the Suedwandstieg trail with view on the Wettersteinmassiv mountains in Leutasch, Tyrol, Austria, Europe

Ice falling off Garibaldi Glacier, Darwin National Park, Tierra del Fuego, Patagonia, Chile, South America

Breakwaters or groynes, coastal protection measures, Noderfriedrichskoog tidal flats, Nationalpark Schleswig-Holsteinisches Wattenmeer, Schleswig-Holstein Wadden Sea National Park, Eiderstedt peninsula, North Friesland region, Schleswig-Holstein, Germany,

Saltwort tidal flats, pioneer vegetation, salt marsh vegetation (Salicornia), red in autumn, Norderfriedrichskoog tidal flats, Nationalpark Schleswig-Holsteinisches Wattenmeer, Schleswig-Holstein Wadden Sea National Park, Eiderstedt peninsula, North Fries

Inland lake with dead trees, Arugam Bay, Sri Lanka, South Asia

View across the Wadden Sea with coastal protection, groynes, Hallig Langeness, small island, at back, North Sea shore, Schleswig-Holstein Wadden Sea National Park, Dithmarschen region, Schleswig-Holstein, Germany, Europe

Fence in the floodplains of Neufelder Koog, polder, Elbe estuary, North Sea coast, Schleswig-Holstein Wadden Sea National Park, Dithmarschen region, Schleswig-Holstein, Germany, Europe

Hippopotamus (Hippopotamus amphibius) with mouth wide open, Masai Mara National Reserve, Kenya, Africa

Aerial picture, Velbert Gut Kuhlendahl golfclub, Neviges, Velbert, Ruhr area, North Rhine-Westphalia, Germany, Europe

Hiker looking out over the coast, sea, lookout point, Pembrokeshire National Park, Wales, United Kingdom, Europe

Sailing yachts in the Cala Mondragó bay, beach of Caló d'en Garrot, natural park of Mondragó, Mallorca, Majorca, Balearic Islands, Mediterranean Sea, Spain, Europe

Beach life in the bay of s'Amarador, Cala Mondragó, natural park of Mondragó, Mallorca, Majorca, Balearic Islands, Mediterranean Sea, Spain, Europe

Hiker looking out over the coast, sea, lookout point, Pembrokeshire National Park, Wales, United Kingdom, Europe

Bay Cala Mondragó with sailing yachts, beach Caló d'en Garrot, natural park of Mondragó, Mallorca, Majorca, Balearic Islands, Mediterranean Sea, Spain, Europe

Trump International Golf Club, Raffles Resort, Canouan Island, Saint Vincent, Caribbean

Remains of old jetty at Lake Constance with the peak of Mt Saentis, Alpstein massif, at back during foehn weather conditions, Baden-Wuerttemberg, Germany, Europe

Left to right: Mts. Dirndln, Hoher Dachstein, Niederer Dachstein and, behind the directional signpost, Mt. Schoeberl, Dachstein Massif, Styria, Austria, Europe

Edelweisshut on Mt Edelweiss-Spitze, Grossglockner High Alpine Mountain Road, Hohe Tauern National Park, Salzburg, Austria, Europe

A drystone wall, ladders, below the peak of Pen-Y-Ghent, Yorkshire Dales, Yorkshire, United Kingdom, Europe

Plage du Liamone beach, Gulf of Sagone, West Corsica, Corsica, France, Europe

Panoramic view over the upper Verdon valley, Haute Verdon mountains, Alpes de Haute Provence, France, Europe

Left to right: Simonyhuette (Simony Cabin), Mts. Gjadstein, Dirndln, Hoher Dachstein, Niederer Dachstein and Schoeberl, Dachstein Massif, Styria, Austria, Europe

Road running through the Valley of Fire State Park, Nevada, USA, North America

Phone and internet access, Hartsfield-Jackson Atlanta International Airport, Atlanta Airport, Atlanta, USA, North America

Field of hops with a white-blue sky near Altmannstein in Altmuehltal Nature Park, Bavaria, Germany, Europe

Nile Crocodile (Crocodylus niloticus), mouth wide open, on the bank of the Chobe River, Chobe National Park, Botswana, Africa

Skywalk, Dachstein Massif, Styria, Austria, Europe

Half Dome in the last evening light, seen from Glacier Point, Yosemite National Park, California, USA, North America

Mt Tegelberg and Neuschwanstein Castle overlooking Forggensee lake, near Fussen, Ammer Mountains, Ostallgaeu, Swabia, Bavaria, Germany, Europe

Gondola lift with Mt. Scheiblingstein in the background, Dachstein Massif, Styria, Austria, Europe

Stranded cargo boat on the shore of Cap Blanc, Nouadhibou, Mauritania, northwestern Africa

Magische Saeule, magic column, on the pier in Meersburg on Lake Constance with the Alpstein massif at back during foehn weather conditions, Baden-Wuerttemberg, Germany, Europe

View of Ballinskelligs Bay, Ring of Kerry, Ireland, Europe

Sandstone cliffs of Cap Blanc, Nouadhibou, Mauretania, northwestern Africa

Old cemetery, St. Ives, Cornwall, England, Great Britain, Europe

Fidel Castro balcony, town hall, Parque Cespedes park, Santiago de Cuba, historic district, Cuba, Caribbean, Central America

Horta on Faial Island, Azores, Portugal

Raffles Resort, Canouan Island, Saint Vincent, Caribbean

Sandstone cliffs of Cap Blanc, Nouadhibou, Mauretania, northwestern Africa

Preikestolen or Prekestolen or Pulpit Rock, Lysefjord, Norway, Scandinavia, Europe

Wallgau, panoramic view, Karwendel and Wetterstein Ranges, golf course, Upper Bavaria, Bavaria, Germany

The Gardens at Bay of Fires in northern Tasmania, Australia

Sandy beach, coastline, sea, coastal trail, Porthchapel Beach, West Cornwall, Cornwall Island, South of England, England, Great Britain, Europe

Torbole on Lake Garda, province of Trento, Trentino, Italy, Europe

Shotover River, motorboat, Arthur's Point, Queenstown, South Island, New Zealand

Evening light on Gibson Steps, limestone cliff and beach, Great Ocean Road, Port Campbell National Park, Victoria, Australia

View across the Joekultungur area towards lake Alftavatn and Eyjafjallajoekull glacier as seen from Kaldaklofsfjoell mountain, Laugavegur hiking trail, Fjallabak Nature Reserve, Highlands of Iceland, Europe

Ucka Canyon, Istria, Croatia, Europe

Cuillin Hills from Elgol, Isle of Skye, Western Highlands, Scotland, United Kingdom, Europe

Sugarloaf Mountain, Botafogo Bay, Rio de Janeiro, Brazil, South America

Panoramic view of the bay of Samos Town on the Greek island of Samos, Eastern Aegean Sea, Greece, Europe

Seiser Alm mountain pasture with Mt. Sciliar in autumn, Dolomites, South Tyrol, Italy, Europe

Sunrise, Bryce Canyon, Utah, USA

Panorama, Spree river and Nikolaiviertel district, Berlin, Germany, Europe

View from the Belchen summit at sunrise in the direction of Feldberg, Black Forest, Baden-Wuerttemberg, Germany, Europe

Trekking, mountain climbing, view from the crater rim towards climbers descending towards Kibo Hut at the Kibo Saddle, in the distance, the peak of Mount Mawenzi surrounded by clouds, Kilimanjaro, Marangu Route, Tanzania, East Africa, Africa

Kalamitsi beach on the Sithonia Peninsula with Mount Athos in the mist, Halkidiki, Macedonia, Greece, Europe

Rock formation The Pinnacles, Nambung National Park, Western Australia, Australia

Morning at Lipan Point, Colorado River, Grand Canyon South Rim, Arizona, United States, America

Aerial view, shot with a fisheye lens, rebuilding in the city centre, Ruhrbania project, Muelheim an der Ruhr, Ruhr area, North Rhine-Westphalia, Germany, Europe

Aerial shot, Mount Tasman and Aoraki, Mount Cook, Aoraki/Mount Cook National Park, South Island, New Zealand

Techno festival "Mayday 2008", Dortmund, North Rhine-Westphalia, Germany, Europe