A visit to Iceland, where two-thirds of babies are born to unmarried parents, to explore whether the nation will be the first country to completely let go of marriage.

Proud native tribes of the islands face head-on, a changing world that threatens their centuries old traditions.

Many endangered species of the islands face the fate of extinction if not for the efforts of the world's leading naturalists fighting to keep their habitat unscathed.

A visit to the remote Greek island of Ikaria where inhabitants live longer than most Americans and try to maintain their centuries old way of life in a modern world.

Weir visits the Taj Mahal in India and learns about conservation efforts to save the Bengal tiger.

The Wonder List visits Jordan and Israel to examine the Dead Sea's decline, and meets the people battling to save it.

A journey through the canals of Venice, where rising sea levels threaten the future of the historic city.

A visit to the Alps where glaciers are receding to examine what the stakes are if the melting continues.

A visit to Florida's endangered Everglades.

Season 2 begins with a visit to Cuba where people are preparing for a tourist invasion.

An examination of the Colorado River that sustains more than 40 million people in the West to see whether enough efforts are being made to see that it continues to flow, with populations booming and the waters receding.

The magical kingdom of Bhuton, "the happiest place on earth," is visited to see whether it can stay blissfully content as the modern world encroaches its borders.

Weir goes on safari in Africa with naturalists fighting to save precious species from extinction.

Bill Weir travels to Amsterdam, famed as one of the world's liberal cities, to find out if it can stay that way amid a rising tide of intolerance.

A report on an American conservationist who has purchased vast tracts of land in Patagonia, much to the dismay of local developers.

A visit to Madagascar where deforestation rages and unique species vanish, and where a fight is brewing 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 billions of dollars worth of copper and gold beneath the pristine wilderness of America's last wild frontier but fishermen say the world's last great salmon run could be jeopardized.

A look at predatory mammals in New Zealand.

A look at whether the fragile beauty of the Incan ruins of Machu Picchu can be protected from an ever-growing number of visitors.

The pristine land of President Lincoln's favorite state is under threat like never before as developers, conservationists and cowboys battle for territory.

Global warming is dramatically altering the landscape — and the prospects — of the world's largest island.

As surging seas and frequent floods batter America's most historic city, the fight is on to save beautiful Charleston and its storied past.

The global shutdown gave Hawaii's fragile islands a chance to recover from the effects of surging tourism. Can a new balance be struck to protect the island?