The Cell Block where Nelson Mandela was imprisoned, Robben Island, Western Cape Province, South Africa, Africa

Entrance of Bunk'art 2 exhibiting photos of convicts by the communist regime between 1912 and 1991, Abdi Toptani Street in downtown Tirana, Albania, Europe

Cambodia tuol sleng museum and former prison and torture chambers of the khmer rouge. phnom penh. photographs of victims imprisoned, tortured and killed at the prison

Cambodia the killing fields national memorial, phnom penh. skulls of victims killed by khmer rouge

Polar bears in the wild. A powerful predator and a vulnerable or potentially endangered species. Two animals wrestling each other, Manitoba, Canada

A lion, Panthera leo, chases after a buffalo, Syncerus caffer, Londolozi, Sabi Sands, South Africa

Polar bears in the wild. A powerful predator and a vulnerable or potentially endangered species, Manitoba, Canada

Male Lion, Panthera leo, chasing vultures away from a giraffe carcass, Londolozi Wildlife Reserve, Sabi Sands, South Africa

Polar bears in the wild. A powerful predator and a vulnerable or potentially endangered species, Manitoba, Canada

A lioness, Panthera leo, yawns, eyes closed, ears back, Sabi Sands, Greater Kruger National Park, South Africa

Polar bears in the wild. A powerful predator and a vulnerable or potentially endangered species, Manitoba, Canada

Male Lion, Panthera leo, feeding on a giraffe carcass, Londolozi Wildlife Reserve, Sabi Sands, South Africa

African lion, Duba Plains, Botswana, Duba Plains, Botswana

A pride of lions, Panthera leo, walking on rocks, Londolozi Wildlife Reserve, Sabi Sands, South Africa

Polar bears in the wild. A powerful predator and a vulnerable or potentially endangered species, Manitoba, Canada

Polar bears in the wild. A powerful predator and a vulnerable or potentially endangered species, Manitoba, Canada