A small group of people trekking through primary rainforest, Gunung Mulu National Park, Sarawak, island of Borneo, Malaysia, Asia

Pygmy man going net hunting, Dzanga Sangha National Park, UNESCO, Central African Republic

View from high viewpoint onto a dense king penguin (Aptenodytes patagonicus) colony at Volunteer Point, Falkland Islands, South America

Bigeye Trevally (Caranx sexfasciatus), schooling in Cabo Pulmo National Marine Park, Baja California Sur, Mexico, North America

Beco do Batman, the nickname for the area around the Vila Madalena neighborhood with its dense concentation of graffiti lining the streets, popular with tourists, Sao Paulo, Brazil, South America

Beco do Batman, the nickname for the area around the Vila Madalena neighborhood with its dense concentation of graffiti lining the streets, popular with tourists, Sao Paulo, Brazil, South America

Migrating Pink-Footed geese over-wintering at Holkham, North Norfolk coast, East Anglia, Eastern England

Migrating Pink-Footed geese over-wintering at Holkham, North Norfolk coast, East Anglia, Eastern England

Migrating Pink-Footed geese over-wintering at Holkham, North Norfolk coast, East Anglia, Eastern England

Migrating Pink-Footed geese over-wintering at Holkham, North Norfolk coast, East Anglia, Eastern England

Migrating Pink-Footed geese over-wintering at Holkham, North Norfolk coast, East Anglia, Eastern England

Overhead view of crowd celebrating Paro Festival, Paro, Paro District, Bhutan

Godowlia Crossing ,downtown, Varanasi, Uttar Pradesh, India.

Ranger guides and visitors maneuver their way through dense jungle during a trekking excursion to the Sabyinyo group of gorillas, Volcanoes National Park, Northern Province, Rwanda, Africa

Ranger guides and visitors maneuver their way through dense jungle during a trekking excursion to the Sabyinyo group of gorillas, Volcanoes National Park, Northern Province, Rwanda, Africa

Ranger guides and visitors maneuver their way through dense jungle during a trekking excursion to the Sabyinyo group of gorillas, Volcanoes National Park, Northern Province, Rwanda, Africa

Ranger guides and visitors maneuver their way through dense jungle during a trekking excursion to the Sabyinyo group of gorillas, Volcanoes National Park, Northern Province, Rwanda, Africa

Rear view of a small group of people bamboo rafting, Jamaica

Dense herd of Wildebeest (Connochaetes taurinus) in the dry grasslands of the Serengeti Plains, Serengeti National Park, Tanzania

Close-up view of a large herd of blue wildebeest (Connochaetes taurinus) crossing the Mara River in dust clouds, Serengeti National Park, Tanzania, Africa

Slow pan view of a large herd of blue wildebeest (Connochaetes taurinus) rushing across a stream in dust clouds, Serengeti National Park, Tanzania, Africa

Close-up view of a herd of blue wildebeest (Connochaetes taurinus) crossing the Mara River in large numbers, Serengeti National Park, Tanzania, Africa

Clover Muir Woods National Park California USA

Low angle view of forest