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

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

Receding waters and population hikes begin to question the sustainability of the Colorado River.

Bhutan tries to maintain its inner contentment and the title of The Happiest Place on Earth.

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