Season 1
On these unspoiled islands, native tribes confront the factors that threaten the traditions of ancient people.
The world's leading naturalists fight to keep this precious natural habitat in balance and save critically-endangered species from extinction.
The inhabitants of this remote Greek island live far longer than most Americans, but can they maintain their centuries-old way of life in the modern world?
Bill Weir travels to India to study conservation efforts to save the majestic Bengal tiger and visits an architectural marvel: the Taj Mahal.
As rising sea levels threaten to destroy this historic jewel, Bill Weir travels to Venice where he investigates the sinking city.
The Wonder List visits the Alps to climb the incredible peaks, but the glaciers are receding, and lives are at stake if the melt continues.
Home to a dazzling array of animals, Bill Weir visits the Everglades to skim the waters, dive the swamp and meet its extraordinary residents.
Season 2
Bill Weir journeys to the heart of Cuba to meet America's distant neighbors, bracing for a tourist invasion.
More than two-thirds of babies in Iceland are born to unmarried parents. Will this nation be the first to let go of marriage completely?
America's most iconic river sustains more than 40 million people in the West. But as populations boom and the waters recede, will it continue to flow?
Can this magical kingdom of Bhutan, the happiest place on Earth, stay blissfully content as the modern world begins to encroach on its remote borders?
The stunning wildlife of Africa is under threat. Bill Weir goes on a safari to meet the naturalists battling to save creatures from extinction.
Bill Weir travels to Amsterdam, famed as one of the world's most liberal cities, to find out if it can stay that way amid a rising tide of intolerance.
Season 3
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?