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

Weir goes on an African safari as he meets naturalists battling to save wildlife living under the threat of extinction.

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.

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.

Iceland may be the first nation to completely do away with marriage, with more than two-thirds of babies born out of wedlock.

As Cuban barriers begin to crumble, the nation braces itself for a tourist invasion.