Series from 2015
CNN's Bill Weir shares stories of extraordinary people, places, cultures and creatures at a crossroads.
What's the best way to protect paradise? In Patagonia, an American conservationist has purchased vast tracts of land to the fury of local developers.
As deforestation rages and unique species vanish, the fight is on to save one of the planet's most special places before it is ruined forever.
As sea levels rise, the sunken city of Heracleion sounds a stark warning of the growing threat faced by the planet's teeming coastal cities.
Miners want to drill for copper and gold beneath the wilderness of Alaska, but fishermen say the world's last great salmon run could be jeopardized.
Conservationists turn killers in this battle to turn back time by eradicating mammal invaders threatening the islands' unique ecosystem.
The breathtaking Incan ruins of Machu Picchu are attracting visitors in record numbers, but can their fragile beauty be protected in the modern world?
