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December 3, 2012 - Colourful crater lakes of Kelimutu volcano, Flores Island, Indonesia. A crater wall separates Tiwu Nua Muri Koo Fai (Lake of Young Men and Maidens) and Tiwu Ata Polo (Bewitched Lake). The two lakes are highly acidic due to underwater fumarole activity and are turqoise in colour.

November 30, 2012 - Glowing Rerombola lava dome with incandescent rockfall deposit, Paluweh volcano, Flores, Indonesia.

November 25, 2012 - Extrusion of lava through lava plug on top of conduit leads to small glowing rockfalls. Batu Tara volcano, Komba Island, Indonesia.

November 25, 2012 - Explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible.

November 26, 2012 - Explosive strombolian type eruption of Batu Tara volcano, Komba Island, Indonesia. Trajectories of red glowing lava bombs are visible.

Soft and hard corals make a coral bommie surrounded by anthias and other small reef fish, Raja Ampat, Indonesia.

Waterfall pouring down a rocky cliff, with blurred motion, resulting from a slow shutter speed; at Welcombe Mouth, Hartland, north Devon, England, United Kingdom, Europe

View towards the Cathedral of Our Lady of the Assumption at dawn, Oaxaca de Juarez, Oaxaca State, Mexico

Meteora, ancient holy Monastery of Rousanos Saint Barbara and Holy Trinity, UNESCO, Kalabaka, Greece

Bikers in plateau Campo Imperatore at sunset, Gran Sasso e Monti della Laga National Park, Abruzzo, Italy, Europe

Aerial of the Pilgrimage Church of St. Coloman near Schwangau, Swabia, Bavarian Alps, Bavaria, Germany, Europe

Tinh Yeu (Love Waterfall) in the jungle near Sa Pa (Sapa), Lao Cai province, Vietnam, Indochina, Southeast Asia, Asia

Forest-covered limestone islands surround a gorgeous lagoon in a remote part of Raja Ampat, Indonesia. This beautiful region is known as the heart of the Coral Triangle and is a popular destination for scuba divers and snorkelers.

Crinoids cling to a large sponge on a healthy coral reef near the island of Sulawesi, Indonesia. This beautiful, tropical region is home to an incredible variety of marine life.

Limestone islands surround a beautiful lagoon in Raja Ampat, Indonesia. This remote region is known as the heart of the Coral Triangle due to its extraordinary marine biodiversity.

Scenic view of hoodoos and rock formations, Sunrise Point, Bryce Canyon National Park, Utah, United States of America, North America

Hikers amongst hoodoo formations on the Fairyland Trail in Bryce Canyon National Park, Utah, United States of America, North America

Hikers admire Matterhorn reflected in Lake Stellisee on a starry night of full moon, Zermatt, Canton of Valais, Swiss Alps, Switzerland, Europe

Man looking at the magnificent sandstone rock structure in the Sharaan Nature Reserve, AlUla, Medina Province, Saudi Arabia

Hiker at the church of San Domenico admires Lake Como framed by pink sky at dawn, Cremia, Lombardy, Italian Lakes, Italy, Europe

Sunset from the south rim of the Grand Canyon at Shoshone Point, UNESCO World Heritage Site, Arizona, United States of America, North America

Rear view of man with hat lying on grass, Alpe Bassetta, Valtellina, Sondrio, Lombardy, Italy, Europe

Sandstone buttes in Monument Valley Navajo Tribal Park on the Arizona-Utah border, United States of America, North America

Hiker on summit of Lingmoor Fell, the Langdale Pikes beyond, Great Langdale, Lake District National Park, UNESCO World Heritage Site, Cumbria, England, United Kingdom, Europe

Cyerce elegans is one of the beautiful butterfly nudibranchs found in the Philippines, Anilao, Philippines.

Several pink anemones cluster on top of a coral outcropping providing homes for several anemone fish, Maldives.

Ice held up to the sun near the Antarctic Peninsula during the summer months, Southern Ocean, Polar Regions

Grand Canyon, Mohave Point, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America

Giants Causeway at sunset, UNESCO World Heritage Site, County Antrim, Ulster, Northern Ireland, United Kingdom, Europe

Man enjoying the sunset in the giant sand dunes of the Sahara Desert, Timimoun, western Algeria, North Africa, Africa

Interior of the Cathedral Sainte-Cecile, UNESCO World Heritage Site, Albi, Midi-Pyrenees, France, Europe

A colorful crinoid clings to a coral reef slope in Komodo National Park, Indonesia. This tropical region in Indonesia is known for its spectacular coral reefs and high marine biodiversity.

Aerial view of beautiful limestone islands scattered about the seascape in Raja Ampat, Indonesia. This tropical area is known for its extraordinary marine biodiversity and is a popular destination for divers and snorkelers.

A brightly colored soft coral adorns prop roots in a blue water mangrove forest in Raja Ampat, Indonesia.

A colorful soft coral adorns a giant clam, Tridacna sp., growing on a healthy reef in Raja Ampat, Indonesia.

Boardwalk at Cape Horn, southern most point in South America, Hornos island, Tierra del Fuego, Chile, South America

Climber on south ridge of Dent Blanche, 4357m, with view to the Matterhorn, Valais, Swiss Alps, Switzerland, Europe

Man on rocks admires the rainbow on the winding road, Stelvio Pass, South Tyrol side, Valtellina, Lombardy, Italy, Europe

Mountainscape in autumn season in Stelvio National Park in Brescia Province, Lombardy, Italy, Europe

Kilchurn Castle reflected in Loch Awe at dawn in winter, Highlands, Scotland, United Kingdom, Europe

California gray whale calf (Eschrictius robustus), with excited tourists in San Ignacio Lagoon, Baja California, Mexico, North America

A tube anemone grows on a sandy seafloor in Komodo National Park, Indonesia. This tropical area in the western Pacific harbors an extraordinary array of marine organisms.

Detail of the spiral tentacles arrangement of a feather duster worm (Bispira sp.) in Komodo National Park, Indonesia.

Adult California gray whale (Eschrictius robustus), spy-hopping in San Ignacio Lagoon, Baja California, Mexico, North America

View of the skeletal ruins of the A-Bomb Dome, Hypocenter, Hiroshima Peace Memorial, UNESCO, Hiroshima, Honshu, Japan

Looking down on the deep blue Katsura River, in the autumnal forests in Arashiyama of Kyoto, Honshu, Japan, Asia