Water rich in blue-green algae (cyanobacteria), mineral salts and fine silica mud at the geothermal spa that owes its existence to the Svartsengi geothermal power plant, Blue Lagoon, near Reykjavik, Iceland, Polar Regions

Water rich in blue-green algae (cyanobacteria), mineral salts and fine silica mud at the geothermal spa that owes its existence to the Svartsengi geothermal power plant, Blue Lagoon, near Reykjavik, Iceland, Polar Regions

Water rich in blue-green algae (cyanobacteria), mineral salts and fine silica mud at the geothermal spa that owes its existence to the Svartsengi geothermal power plant, Blue Lagoon, near Reykjavik, Iceland, Polar Regions

Workers on crowded commuter train of Western Railway near Mahalaxmi Station on the Mumbai Suburban Railway, India

Female workers on crowded commuter train of Western Railway near Mahalaxmi Station on the Mumbai Suburban Railway, India

Office workers on crowded commuter train of Western Railway near Mahalaxmi Station on the Mumbai Suburban Railway, India

Workers on crowded commuter train of Western Railway near Mahalaxmi Station on the Mumbai Suburban Railway, India

Office workers on crowded commuter train of Western Railway near Mahalaxmi Station on the Mumbai Suburban Railway, India

Office workers on crowded commuter train of Western Railway near Mahalaxmi Station on the Mumbai Suburban Railway, India

These reindeer peoples' entire existence is based around their herds of reindeer, which provide milk, skins for clothes, horn for carving and medicine, transport and occasionally, meat. the tsaatan are part of the tuvan ethnic group, which inhabits the tuvan republic of russia. there are only about 200 tsaatan in total, spread over 100,000 sq km of northern mongolia. they are nomadic, often moving their small encampments every three to four weeks, searching for special types of grass and moss loved by the reindeer. the tsaatan are strong practitioners of shamanism. west taiga, northern mongolia

Gran Cenote de Tulum in Yucatan Peninsula, Quintana Roo, Mexico. There are thousands of cenotes dotted all over Mexico���s Yucatan Peninsula, and their existence is as much a defining characteristic of the region as is the distinct geological feature from which they result. Once revered by the ancient Mayans as sacred wells, they are now magnets for tourists, adventurers, and explorers alike.

Golden Lion Tamarin Monkey (Leontideus rosalia), adult, portrait, existence : South America

Famous Incan grass-rope suspension bridge across Apurimac River rebuilt annually since Incan period and only one still in existence, Inca Road, Altiplano, Peru

Famous Incan grass-rope suspension bridge across Apurimac River, rebuilt annually since Incan period and only one still in existence, Inca Road, Altiplano, Peru

Famous Incan grass-rope suspension bridge across Apurimac River rebuilt annually since Incan period and only one still in existence, Inca Road, Altiplano, Peru

Famous Incan grass-rope suspension bridge across Apurimac River rebuilt annually since Incan period and only one still in existence, Inca Road, Altiplano, Peru

Famous Incan grass-rope suspension bridge across Apurimac River rebuilt annually since Incan period and only one still in existence, Inca Road, Altiplano, Peru

Famous Incan grass-rope suspension bridge across Apurimac River rebuilt annually since Incan period and only one still in existence, Inca Road, Altiplano, Peru