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Gregg Wallace discovers how one of the world's largest chocolate factories produces a staggering seven million bars a day.

The hosts explore the largest fresh milk processing plants on earth to see how they get milk from cow to carton in less than 24 hours.

With Robert Mugabe gone, Romesh sets out to travel around Zimbabwe to find out if the English should be holidaying here once more.

British comedian Romesh Ranganathan visits some of the most unlikely holiday destinations in the world to determine the veracity of the stereotypes associated with them.

British comedian Romesh Ranganathan visits some of the most unlikely holiday destinations in the world to determine the veracity of the stereotypes associated with them.

The filmmaker explores the journey of the mighty Zambezi, Africa's wildest river. It floods across endless plains, fueling the migration of 30,000 wildebeests and turning villages into islands.

Europe's Danube stretches 2,800 kilometres from the Alps to the Black Sea. From the great white pelican to the endangered sturgeon, it also supports a surprising range of wildlife.

The Yukon in North America boasts one of the longest salmon runs in the world. Meet the rich variety of life that has made this great frozen river home, from musk ox to ice bears.

Ben Fogle braves the deep deserts and sand dunes of Namibia in order to visit Gideon David's young family and learn the reason behing their unique way of life.

Ben Fogle arrives in Alaska to meet Mike and Fran Turner, a married couple leading a simple, self-sufficient life in their self-built log cabin.

Ben Fogle meets Bill and Bob, the daring brothers who decided to live in a mobile home after testifying against a criminal organisation.

The dark is a world of opportunity for mammals. Additionally, more than two-thirds prefer the cover of the night, with some now returning to the safety of the shadows to avoid humans.

For millions of years, mammals have adapted to diverse environments, but rapid changes driven by humans challenge their survival.

Water challenges air-breathing mammals, with only a small fraction truly adapted to marine life, like whales and dolphins that showcase remarkable intelligence and social behaviours.

Anita Kapoor cruises aboard a river liner on China's Yangtze River while Dominic explores luxuries enjoyed by the royal family in Rajasthan, India.